HERLEY INDUSTRIES INC /NEW
S-3, 2000-01-14
SEARCH, DETECTION, NAVAGATION, GUIDANCE, AERONAUTICAL SYS
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    As filed with the Securities and Exchange Commission on January __, 2000

                                             Registration No. 333-72427

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM S-3
                             REGISTRATION STATEMENT
                                      under
                           THE SECURITIES ACT OF 1933

                             HERLEY INDUSTRIES, INC.
             (Exact name of registrant as specified in its charter)

          Delaware                                    23-2413500
(State or other jurisdiction of             (I.R.S. Employer Identification No.)
incorporation or organization)

10 Industry Drive                            Myron Levy, President
Lancaster, Pennsylvania 17603-4025           Herley Industries, Inc.
(717) 397-2777                               10 Industry Drive
(Address, including zip code and telephone   Lancaster, Pennsylvania 17603-4025
number, including area code, of registrant's (717) 397-2777
principal executive offices)                 (Name address and telephone number,
                                             including area code, of agent for
                                             service)
                                     -------
                                    Copy to:
                            David H. Lieberman, Esq.
                     Blau, Kramer, Wactlar & Lieberman, P.C.
                             100 Jericho Quadrangle
                             Jericho, New York 11753
                                 (516) 822-4820

     Approximate  date of commencement of proposed sale to public:  From time to
time after the effective date of this registration statement.

     If the only  securities  being  registered  on this Form are being  offered
pursuant to dividend or interest  reinvestment plans, please check the following
box [ ].

     If any of the securities being registered on this Form are to be offered on
a delayed or continuous  basis  pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box [X].

     If this Form is filed to  register  additional  securities  for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration  statement  number  of the  earlier
effective registration statement for the same offering.

     If this Form is a  post-effective  amendment  filed pursuant to Rule 462(c)
under the  Securities  Act,  check the following box and list the Securities Act
registration number of the earlier effective registration statement for the same
offering.

     If delivery of the  prospectus is expected to be made pursuant to Rule 434,
please check the following box []
<PAGE>
                         CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------
Title of Each Class of                    Proposed Maximum        Proposed Maximum
Securities to be         Amount to be     Offering                Aggregate           Amount of
Registered               Registered       Price Per Security (1)  Offering Price (1)  Registration Fee
- -------------------------------------------------------------------------------------------------------
<S>                      <C>                   <C>                <C>                     <C>
Common Stock,
par value $.10
per share (2)            1,265,000 shs.        $15.50             $19,607,500             $5,255

- -------------------------------------------------------------------------------------------------------
<FN>
(1)  Estimated solely for the purpose of calculating the registration fee, based
     on the  closing  price of the common  stock  reported  in the  consolidated
     reporting system on January 12, 2000.
(2)  Represents  1,265,000  shares of common stock issuable upon the exercise of
     common stock purchase warrants.
- -------------------------------------------------------------------------------------------------------
</FN>
</TABLE>

The Registrant hereby amends this  Registration  Statement on such date or dates
as may be necessary to delay its effective date until the Registrant  shall file
a further amendment which specifically  states that this Registration  Statement
shall  thereafter  become  effective  in  accordance  with  Section  8(a) of the
Securities  Act of  1933  or  until  the  Registration  Statement  shall  become
effective on such date as the Commission,  acting pursuant to said Section 8(a),
may determine.
<PAGE>
Information   contained  herein  is  subject  to  completion  or  amendment.   A
registration  statement  relating  to these  securities  has been filed with the
Securities  and Exchange  Commission.  These  securities may not be sold nor may
offers to buy be accepted prior to the time the registration  statement  becomes
effective.  This  prospectus  shall  not  constitute  an  offer  to  sell or the
solicitation of an offer to buy nor shall there be any sale of these  securities
in any State in which such offer,  solicitation  or sale would be unlawful prior
to  registration or  qualification  under the securities laws of any such State.
<PAGE>
Preliminary Prospectus

                              SUBJECT TO COMPLETION
                             Dated January __, 2000


                             HERLEY INDUSTRIES, INC.

                        1,265,000 Shares of Common Stock



     Herley is selling  1,265,000  shares of common stock.  The shares are to be
issued upon the exercise of Herley's outstanding common stock purchase warrants.
Each  warrant  represents  the right to purchase one share of common stock at an
exercise price of $15.60 per share until January 16, 2000.

     Herley will bear the expenses in connection  with the  offering,  including
filing fees and Herley's legal and accounting fees, estimated at $10,000.

     Herley's  common stock is traded on the Nasdaq National Market System under
the symbol HRLY. On January 11, 2000, the last reported sale price of the common
stock as reported by the Nasdaq National Market System was $151/16 per share.

Neither  the  Securities  and  Exchange  Commission  nor  any  state  securities
commission  has approved or disapproved  of these  securities,  or determined if
this prospectus is truthful or complete. Any representation to the contrary is a
criminal offense.

                        Prospectus dated January __, 2000
<PAGE>
                                TABLE OF CONTENTS
                                                                           Page

RISK FACTORS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-2-
     Risks Associated with Expansion into New Markets . . . . . . . . . . . .-2-
     Fluctuations in Quarterly Results; Future Operating Results Uncertain. .-2-
     Technological Change . . . . . . . . . . . . . . . . . . . . . . . . . .-2-
     Dependence Upon Key Personnel. . . . . . . . . . . . . . . . . . . . . .-3-
     International Sales; Currency Fluctuations . . . . . . . . . . . . . . .-3-
     Dependence on Proprietary Technology; Risk of Third Party Claims
      for Infringement. . . . . . . . . . . . . . . . . . . . . . . . . . . .-4-
     Potential Anti-Takeover Provisions . . . . . . . . . . . . . . . . . . .-4-
     Additional Issuances of Stock Without Stockholder Approval . . . . . . .-4-

HERLEY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -5-
     General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -5-
     Products. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -6-
     New Product Development and Applications. . . . . . . . . . . . . . . .-11-

USE OF PROCEEDS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-12-

PRICE RANGE OF COMMON STOCK AND WARRANTS . . . . . . . . . . . . . . . . . .-12-

DIVIDEND POLICY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-13-

PERFORMANCE CHART. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-13-

DESCRIPTION OF SECURITIES. . . . . . . . . . . . . . . . . . . . . . . . . .-14-
     Capital Stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-14-
     Common Stock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-14-
     Description of Warrants . . . . . . . . . . . . . . . . . . . . . . . .-15-

PLAN OF DISTRIBUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . .-17-

LEGAL MATTERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-17-

EXPERTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-17-

WHERE YOU CAN FIND MORE INFORMATION. . . . . . . . . . . . . . . . . . . . .-17-

INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE. . . . . . . . . . . . . . .-18-


You should rely only on the  information  contained in this document or to which
Herley has referred you.  Herley has not  authorized  anyone to provide you with
information that is different.  This document may only be used where it is legal
to sell these securities.  The information in this document may only be accurate
on the date of this document.
<PAGE>
                                  RISK FACTORS

     In evaluating whether to buy the securities offered by this prospectus, you
should consider carefully the following factors.

Risks Associated with Expansion into New Markets

     Herley can be expected to  introduce  new  products  and expand its product
offerings  in its existing  markets.  Broad  market  acceptance  of Herley's new
products  is  critical  to its future  success.  Herley  believes  that  factors
affecting  the  ability of its  products  to  achieve  broad  market  acceptance
include:

 .         product performance;
 .         price;
 .         adaptation to rapid technological change; and
 .         competitive product offerings.

     There can be no assurance that Herley will be able to respond  promptly and
effectively  to the  challenges  of  technological  change and its  competitors'
innovations,  or  that  Herley  will be able to  achieve  the  necessary  market
acceptance, or compete effectively, in its product markets.

Fluctuations in Quarterly Results; Future Operating Results Uncertain

     Herley's quarterly  operating results have in the past, and its results may
in the future, fluctuate significantly depending on factors such as:

 .         demand for its products;
 .         the size and timing of orders;
 .         the number, timing and significance of new product announcements by it
          and its competitors;
 .         its ability to develop, introduce and market new and enhanced versions
          on a timely basis;
 .         the level of product and price competition;
 .         changes in operating expenses;
 .         changes in average selling  prices  and  product  mix;
 .         product returns;
 .         changes  in technology;
 .         and general economic factors.

     As a result,  because product  revenues in any quarter may be substantially
dependent on orders booked and shipped in that quarter,  revenues for any future
quarter may not be  predictable  with any  significant  degree of  accuracy.  If
revenue  levels  are below  expectations,  operating  results  are  likely to be
adversely  affected and may be below the  expectations of public market analysts
and investors.  In such event, the price of the Herley common stock would likely
decrease.

Technological Change

     Flight    instrumentation   and   microwave   components   industries   are
characterized by technological change.  Herley's future success will depend upon
its ability to continually  enhance its current products and systems and develop
and  introduce  new products  and systems  that keep pace with the  increasingly
sophisticated  needs of its customers and the technological  advancements of its
competitors.  There  can be no  assurance  that  Herley  will be  successful  in
<PAGE>
developing  and  marketing  product  enhancements,  new  products or totally new
systems that will adequately  meet the  requirements  of the  marketplace.  As a
result,  Herley has  expended  substantial  resources  for  system  and  product
development and intends to continue to expend such resources in the future.  The
development of new or enhanced  systems or products  results in expenditures and
costs that Herley may not recover if the system or product is unsuccessful.

Dependence Upon Key Personnel

     The success of Herley  depends upon the efforts of its  executive  officers
and other key personnel, including Lee N. Blatt, Chairman of the Board and Chief
Executive Officer and Myron Levy, President, and in the event of an acquisition,
its  ability to  attract  and  retain  other  highly  qualified  management  and
technical  personnel.  Although Herley has existing  employment  agreements with
Messrs.  Blatt and Levy the loss of the services of Mr. Blatt and Mr. Levy could
have an adverse  effect on  Herley's  business  and  prospects.  Herley does not
maintain  key-man life insurance.  There can be no assurance that Herley will be
successful in the event it needs to hire and retain additional key personnel.

International Sales; Currency Fluctuations

     International sales represented  approximately 29% of Herley's net revenues
for the 52 weeks ended August 1, 1999 and August 2, 1998.  Herley  believes that
continued  profitability  requires  additional  expansion  of sales  in  foreign
markets.  This  expansion  will  continue  to  require  significant   management
attention and financial  resources and could adversely affect Herley's operating
margins. In order to increase  international sales in the future,  Herley may be
required to establish  additional foreign operations,  hire additional personnel
and recruit  additional  international  resellers.  To the extent that Herley is
unable to expand international sales in a timely and cost-effective  manner, its
business,   operating  results  and  financial  condition  could  be  materially
adversely affected.  In addition,  there can be no assurance that Herley will be
able to maintain or increase international market demand for its products.

     Substantially,   all  of  Herley's   international   sales  are   currently
denominated in U.S. dollars.  Consequently,  Herley does not currently engage in
any hedging activities.  To date, exposure to currency fluctuations has not been
significant  but there  can be no  guarantee  that  future  fluctuations  in the
currency  exchange  rates will not have a material  adverse  effect on  Herley's
business, operating results and financial condition.

     Additional  risks inherent in Herley's  international  business  activities
include:

 .         unexpected changes in regulatory requirements;
 .         tariffs and other trade barriers;
 .         costs of localizing products for foreign countries;
 .         lack of acceptance of localized products in foreign countries;
 .         longer accounts receivable  payment  cycles;
 .         difficulties  in  collecting   payment;
 .         difficulties in managing international operations;
 .         potentially  adverse  tax  consequences,   including  repatriation  of
          earnings;
 .         reduced protection for intellectual property;
 .         the burdens of complying with a wide variety of foreign laws;  and
 .         the effects of high local wage scales and other expenses.
<PAGE>
     There  can be no  assurance  that  such  factors  will not have a  material
adverse effect on Herley's future  international  sales and,  consequently,  its
business, operating results and financial condition.

     Dependence  on  Proprietary  Technology;  Risk of Third  Party  Claims  for
     Infringement

     Herley does not have any patents,  other than through its General Microwave
subsidiary  which has 12  patents  in the  United  States  which  cover  various
products.  Herley  relies on a  combination  of patent,  copyright and trademark
laws, trade secrets,  confidentiality  procedures and contractual  provisions to
protect  its  proprietary  rights.  The laws of some  foreign  countries  do not
protect  proprietary  rights as thoroughly as do the laws of the United  States.
Policing unauthorized use of Herley's products is difficult,  time-consuming and
costly.  However,  the  actions  taken by Herley to  establish  and  protect its
proprietary  rights may not be enough to prevent imitation of its products or to
prevent others from claiming  violations of their proprietary  rights by Herley.
Any such claims, whether with or without merit, could be time-consuming,  result
in costly  litigation and diversion of resources,  cause product shipment delays
or  require  Herley to enter  into  royalty or  licensing  agreements.  Any such
royalty or licensing  agreements  may not be available  on terms  acceptable  to
Herley or at all.  In the event of a  successful  claim of product  infringement
against  Herley and the failure or inability of Herley to license the  infringed
or similar  technology,  Herley's  business,  operating  results  and  financial
condition could be materially adversely affected.

Potential Anti-Takeover Provisions

     Certain   provisions   of  Delaware   law  and  Herley's   Certificate   of
Incorporation  and  By-laws  could make it more  difficult  for a third party to
acquire control of Herley,  even if the change in control could be beneficial to
the interests of the stockholders. These provisions include

 .    Section 203 of the Delaware  General  Corporation Law, which prohibits
     certain business combinations with interested stockholders;
 .    the classification of Herley's Board of Directors into three classes; and
 .    the  requirement  that  stockholders   owning  at  least  80%  of  the
     outstanding  shares of Herley  common stock approve  certain  transactions,
     including  mergers and sales or  transfers of all or  substantially  all of
     Herley's assets.

     These  provisions  could limit the price that  certain  investors  might be
willing to pay in the future for shares of Herley common stock.

Additional Issuances of Stock Without Stockholder Approval

     After  this  offering,  Herley  will  have an  aggregate  of  approximately
10,340,498  shares of common stock  authorized but unissued and not reserved for
specific  purposes.  All of such  shares  may be issued  without  any  action or
approval by Herley's  stockholders.  Any shares issued would further  dilute the
percentage ownership of Herley held by the investors in this offering.  Unissued
but  reserved  shares of Herley  common  stock  include  shares of common  stock
reserved for issuance in connection with the exercise of

 .      Herley's publicly-traded warrants;
 .      the stock options issued under Herley's stock option plans; and
 .      currently outstanding warrants, including the warrants held by officers
       and directors.
<PAGE>
The market  price of Herley  common  stock  could drop as a result of sales of a
large number of shares in the market,  or the  perception  that such sales could
occur. These factors could also make it more difficult for Herley to raise funds
through future  offerings of Herley common stock during the terms of these stock
options and warrants  because of the potential  dilution and because the holders
thereof might be expected to convert or exercise them if the market price of the
Herley common stock exceeds their conversion or exercise price.

                                     HERLEY

General

     Herley is  engaged  in the  design,  development,  manufacture  and sale of
flight instrumentation  components and systems, and microwave products primarily
to the U.S.  government,  foreign governments,  and aerospace companies.  Flight
instrumentation products include:

 .    command and control systems;
 .    transponders;
 .    flight termination receivers;
 .    telemetry transmitters and receivers;
 .    pulse code modulator, PCM, encoders; and
 .    scoring systems.

Flight instrumentation products are used to:

 .    accurately track the flight of space launch vehicles, targets, and unmanned
     airborne vehicles, or UAVs;
 .    communicate between ground systems and the airborne vehicle;
 .    if  necessary,  destroy  the  vehicle  if it is  veering  from its  planned
     trajectory; and
 .    train troops and test weapons.

     Herley's  command and control  systems are used on training and test ranges
domestically  and  in  foreign  countries.  Herley  has  an  installed  base  of
approximately 100 command and control systems around the world, which are either
fixed installations, transportable units or portable units.

     Herley  is  also  engaged  in  the  design,  development,  manufacture  and
marketing of:

 .    microwave  devices  and  electronic systems;
 .    equipment; and
 .    components.

     A  substantial  portion of the  Company's  microwave  products  are sold to
manufacturers  and users of microwave  systems and equipment for applications in
the defense  electronics  industry,  including in connection  with the radar and
defense electronic  systems on tactical fighter aircraft;  as well as being used
in Herley's flight instrumentation systems and products. Herley also sells these
components  and  equipment  for  use in the  industrial  sector  as  well  as in
commercial  telecommunications  industries.  Typical  applications  for Herley's
microwave products include:
<PAGE>
 .    electronic  warfare  and   countermeasures;
 .    airborne  and  shipboard navigation  and  communications;
 .    radar  systems;
 .    missile  guidance systems;
 .    automatic test equipment; and
 .    satellite communications.

     Herley has grown  internally and through six strategic  acquisitions.  As a
result,  Herley has  evolved  from a  components  manufacturer  to a systems and
service provider and has leveraged its technical capabilities and expertise into
domestic commercial and foreign defense markets.

     Since its inception in 1965, Herley has designed and manufactured microwave
devices for use in various  tactical  military  programs.  In June 1986,  Herley
acquired a small  engineering  company,  Mission  Design,  Inc.,  engaged in the
design and development of transponders. This acquisition enabled Herley to enter
the flight instrumentation business beginning with the design and manufacture of
range safety transponders.  In September 1992, Herley acquired substantially all
of the assets of Micro-Dynamics, Inc. Micro-Dynamics of Woburn, Massachusetts, a
microwave  subsystem  designer and  manufacturer.  In June 1993, Herley acquired
Vega Precision Laboratories,  Inc. of Vienna, Virginia, a manufacturer of flight
instrumentation  products.  In March  1994,  Herley  entered  into an  exclusive
license  agreement  for the  manufacture,  marketing  and  sale of the  Multiple
Aircraft GPS Integrated Command & Control,  or (MAGIC2),  systems. In July 1995,
Herley  acquired  certain assets and the business of Stewart Warner  Electronics
Corp. of Chicago,  Illinois,  a  manufacturer  of high  frequency  radio and IFF
interrogator  systems. In August 1997, Herley acquired Metraplex  Corporation of
Frederick,  Maryland,  which has enabled Herley to enter the airborne PCM and FM
telemetry and data acquisition  systems market. In January 1999, Herley acquired
all of the issued and outstanding common stock of General Microwave  Corporation
of  Amityville,  New York,  expanding its offering of microwave  components  and
electronic  systems,  and its customer base in the industrial sector, as well as
in the commercial telecommunications industries.

Products

     Command and Control Systems (C2)

     For over thirty years, Herley has been manufacturing  products in the radar
enhancement  field.  Herley's  command and control systems have been used to fly
remotely a large variety of unmanned aerial vehicles, typically aircraft used as
target drones or Remotely Piloted  Vehicles,  or RPVs, and some surface targets.
Operations  have been conducted by users on the open ocean,  remote land masses,
and instrumented test and training ranges.

     Herley's  command and control  systems are currently in service  throughout
the world. Herley's pulse- positioned-coded,  or PPC, concept enables the use of
standard  radar  technology to track and control  unmanned  vehicles.  Using the
radar beacon mode, PPC pulse groups are transmitted and received for transfer of
command and telemetry data while employing the location precision and advantages
of radar techniques.

     Command and control  systems permit a ground  operator to fly a target or a
UAV through a preplanned mission. That mission may be for reconnaissance,  where
the vehicle is equipped with high  definition TV sensors and the necessary  data
links  to send  information  back to its  command  and  control  systems  ground
station.  The UAV may also be used as a decoy, since the operator can direct the
flight  operations  that will make the small drone appear to be a larger  combat
aircraft.
<PAGE>
     With  the  1994  licensing  of the  MAGIC2  system,  Herley  increased  the
selection of command and control systems.  The 6104 TTCS, or Target Tracking and
Control  System,  unit is a  line-of-sight  command and  control  system with an
installed base of equipment worldwide.  Herley's engineers and marketers are now
able to offer the MAGIC2  system as a supplement  to, or  replacement  for, this
installed base of equipment.  The MAGIC2 system affords over-the-horizon command
and control  using GPS  guidance  and control of multiple  targets from a single
ground station.  The ability to control multiple targets at increased  distances
represents a significant product improvement. The increasing demand for enhanced
performance  by the U.S.  Navy as well as  foreign  navies in  littoral  warfare
scenarios can be satisfied by the use of the MAGIC2 system.

     The new Model 6104 TTCS is a highly  flexible,  multiple  processor  design
with high resolution  graphics,  which can be field configured within minutes to
fly or control  any  selected  vehicle for which it is  equipped.  The system is
designed to operate with a large variety of vehicles. A basic TTCS configuration
is normally  supplied  with a standard  Herley  command  panel and the  software
peculiar  to one  vehicle.  Telemetry  display  software  is  embedded  for  the
specified  vehicle,  and a magnetic  hard drive is  supplied  with a mission map
prepared in accordance  with a customer  supplied  detailed map of the area. The
TTCS  is used  in  support  of  missile,  aircraft  and  other  weapons  systems
development and testing. Herley continues to provide this system to customers to
support their requirement.

     The MAGIC2 system provides control of multiple targets from a single ground
control system, and utilizes GPS to provide accurate position  information.  The
MAGIC2 system meets a growing  requirement to test against multiple threats with
the automated defense  capabilities of ships like the AEGIS cruiser and the E-2C
aircraft.

     Military  surveillance  operations  typically use UAVs,  RPVs, or drones to
avoid  the cost and risk of  manned  surveillance  vehicles  in the  event of an
accident or if the vehicle is shot down. These inexpensive drones are controlled
in flight by a Herley  command  and  control  system,  which may be mounted in a
trailer  that may be moved from place to place by  helicopter  or truck.  Herley
also  manufactures  portable  command  and control  systems  that are mounted on
tripods that can be easily  transported  by an  operational  team.  The portable
units permit ready  deployment  in rugged  terrain and may also be used on ships
during open ocean exercises.

     In recent years,  teaming  arrangements  between prime military contractors
and Herley have  increased.  Large  companies  bidding on major programs seek to
align  themselves  with  parts and  systems  manufacturers  such as  Herley  for
economic  reasons  as well  as for  the  technical  expertise  afforded  by such
alliances.  Teaming  arrangements  with Tracor  Corporation and Northrop Grumman
Corporation  have  resulted  in recent  awards to Herley for command and control
systems  in  Australia  and  Singapore,  and  Herley  is  presently  negotiating
additional teaming arrangements.

     Telemetry Systems

     Missile,  UAV, or target testing on domestic and international  test ranges
requires  flight safety and  performance  data  transmission  to maximize flight
safety during the test operation.  Surveillance and intelligence  gathering UAVs
also  require a data  transmission  downlink  and a command and control  systems
uplink to accomplish  their  mission.  Herley has  developed a telemetry  system
capability that can be configured to meet individual  customers' needs.  Various
components  of  the  system  include  data  encoders,  transmitters  and  flight
termination  receivers.  Each  has a  distinctive  role  and  each is key to the
success of the mission.
<PAGE>
     In 1972,  Metraplex  began  developing data encoding and  acquisition,  and
signal conditioning  equipment.  Metraplex is now a leading  manufacturer of PCM
and  FM  telemetry  and  data   acquisition   systems  for  severe   environment
applications, whose products are used worldwide for testing space launch vehicle
instrumentation,   aircraft  flight  testing,  and  amphibian,   industrial  and
automotive vehicle testing.  The product portfolio ranges in size and complexity
from miniature encoders to completely programmable data acquisition systems.

     Herley's acquisition of Metraplex in 1997 allows Herley to offer a complete
airborne  data link  system.  With the digital  capability  of Metraplex in data
encoding and acquisition  elements combined with the radio frequency  capability
of Herley  in  providing  its  telemetry  transmitters  and  flight  termination
receivers,  Herley offers a full line of narrow or wide band airborne  telemetry
systems to meet a wide  variety  of  industrial  needs,  both  domestically  and
internationally.

     Transponders

     Herley manufactures a variety of expendable transponders, including:

 .    range safety;
 .    identification friend or foe, or IFF;
 .    command and control; and
 .    scoring systems.

     Transponders  are small,  expendable,  electronic  systems  consisting of a
transmitter,   sensitive  receiver  and  internal  signal  processing  equipment
comprised of active and passive  components.  These components include microwave
subassemblies such as amplifiers,  oscillators and circulators.  The transponder
receives  signals  from  radars,  changes and  amplifies  the  frequency  of the
signals,  and sends back a reply on a different frequency and signal level. This
reply will be a strong,  noise free  signal  upon which the  tracking  radar can
"lock," and one which is far superior to skin reflection tracking,  particularly
under adverse weather conditions after the launch.

     In range safety  applications,  transponders  enable  accurate  tracking of
space launch and unmanned aerial vehicles,  missiles,  and target drones so that
position and direction are known  throughout its flight.  In the case of several
defense and commercial  space launch vehicles  (i.e.,  Delta,  Atlas,  Titan and
Pegasus),  the Herley  transponder  is tracked by the ground launch team all the
way to space  orbit,  and in certain  instances  through  several  orbits,  as a
reference  location  point in space to assure  that the launch  payload has been
properly placed in orbit.

     IFF  transponders,  which are used in conjunction  with the FAA Air Traffic
Control  System,  enable ground  controllers  to identify the unmanned  targets,
drones and cruise  missiles on which these units fly and to vector  other manned
aircraft safely away from the flight path of the unmanned aerial vehicle.
<PAGE>
     Command and control  transponders  provide the link  through the  telemetry
system for relaying  ground signals to direct the vehicle's  flight.  The uplink
from the ground  control  station,  a series of coded pulse groups,  carries the
signals  that command the flight  control  guidance  system of the vehicle.  The
downlink to the ground provides both tracking signals for range safety,  as well
as acknowledgment and status of the uplink commands and their  implementation in
the vehicle. The transponder is therefore the means to fly the vehicle.

     Scoring  systems  are mounted on both  airborne  and sea  targets.  Scoring
systems  enable test and evaluation  engineers to determine the  "miss-distance"
between a projectile and the target at which it has been launched.

     Flight Termination Receiver

     A flight termination receiver, or FTR, is installed as a safety device in:

 .    a test missile;
 .    a UAV target; or
 .    a space launch vehicle.

     The FTR has a built-in  decoder that enables it to receive a complex series
of audio tones which,  when  appropriate,  will set off an explosive charge that
will destroy the vehicle. A Range Safety Officer, or RSO, using the range safety
transponder will track the vehicle in flight to determine if it is performing as
required.  If the RSO detects a malfunction  in the test or launch  vehicle that
causes  it to veer  from a  planned  trajectory  in a manner  that may  endanger
personnel or facilities, the RSO will transmit a coded signal to the onboard FTR
to explode the vehicle harmlessly.

     HF Communications and IFF Interrogators

     The Company  also designs and  manufactures  high  frequency  radio and IFF
interrogators.  This high frequency communications equipment is used by the U.S.
Navy and foreign  navies that conduct  joint  military  exercises  with the U.S.
Navy. The IFF interrogators are used as part of shipboard equipment and are also
placed on  coastlines,  where they are employed as silent  sentries.  Herley has
been a  significant  supplier to the Republic of Korea for over twenty years and
has a large,  established  installed  base of  equipment.  Herley has been,  and
continues to be, a supplier to the Republic of Korea KDX destroyer program.

     Microwave Devices

     Herley   manufactures  solid  state  microwave  devices  at  the  following
locations:

 .    Farmingdale, New York;
 .    Woburn, Massachusetts; and
 .    Jerusalem, Israel.

These  devices  are  manufactured  for  use in  its  transponders  and  existing
long-term military programs,  both as part of new production and for spare parts
and repair  services.  These  microwave  devices are used in a variety of radar,
communications  and  missile  applications,  including  airborne  and  shipboard
navigation and missile guidance systems.
<PAGE>
     Herley designs and manufactures complex microwave  integrated circuits,  or
MICs.  MICs consist of  sophisticated  assemblies  that perform many  functions,
primarily involving switching of microwave signals.  MICs manufactured by Herley
are employed in many  defense  electronics  military  systems as well as missile
programs.  Herley  also  manufactures  magnetrons,  which are the  power  source
utilized in the production of Herley's transponders.

     Herley's three facilities that manufacture  microwave  devices each have an
area of  specialization  that tends to limit the competitive  pricing  pressures
generally found in the commercial  business area.  Herley seeks the more limited
production,  higher unit cost microwave subsystem  applications,  where Herley's
engineering experience is of primary advantage to its customers.

     In Woburn,  Herley specializes in high power microwave  devices,  generally
narrow  band,  that are  used in radar  system  transmitters  and in long  range
missiles.  While there are many  suppliers  of low power  microwave  components,
there are  relatively  few companies  with the expertise or facilities to design
and test high power devices.  High power devices frequently use small amounts of
nuclear material to enhance breakdown of high energy pulses and Herley is one of
very few companies with an active  nuclear  license that permits the handling of
these trace amounts of nuclear materials.

     Herley has more  recently  become the  preeminent  supplier  of solid state
receiver  protector  devices,  that are able to  withstand  high  energy  pulses
without the use of nuclear  materials.  These high power devices protect a radar
receiver from  transient  bursts of microwave  energy and are employed in almost
every  military and  commercial  radar system.  For its  engineering  efforts in
designing  solid state  receiver  protectors for the F-16, the United States Air
Force  awarded  the  Company  cash  awards  as  part of the  government's  value
engineering program.

     In  Farmingdale,   Herley  produces  lower  power,   broad  band  microwave
integrated  assemblies for the electronic  defense  business area. These costly,
complex   assemblies   combine   microwave   functions  such  as  amplification,
attenuation,  switching of multiple  signals,  and phase and amplitude  control.
Their  applications  include  Rear  Warning  Receivers,  or  RWR's,  Electronics
Countermeasure, or ECM, systems, and highly sensitive receiver systems.

     In Farmingdale,  Herley also produces  components that are sold through its
General Microwave  catalog,  which for almost forty years has been the microwave
engineer's  handbook  for  attenuating  devices  and  IQ  modulation  and  phase
shifters.

     Herley sells its catalog  products to  engineering  design  facilities on a
worldwide  basis, and is considered the industry leader in attenuators and phase
shifters.

     Herley's Israel division supplies microwave sources, which generate signals
that  are  used  in  microwave  oscillators.  Herley's  Israel  operation  sells
approximately  equally to various foreign  governments  and to the U.S.  defense
industry.  Herley  specializes  in  digitally  tuned  oscillators,  or DTO's,  a
critical component of many ECM systems.
<PAGE>
     With its three facilities and their diverse specialties,  Herley is able to
offer its  customers  a more  broadly  based  solution  in the form of  complex,
integrated  microwave  assemblies.  In the  modular  approach  now common in the
design of radar and ECM systems,  the entire  system may comprise only a handful
of Shop  Replaceable  or Line  Replaceable  units.  Herley's goal is to become a
supplier  of  this  magnitude  to  its  existing  customer  base,   through  the
combination of its microwave capabilities.

New Product Development and Applications

     Herley believes that its growth  depends,  in part, on its ability to renew
and expand its technology, products, and design and manufacturing processes with
an  emphasis  on cost  effectiveness.  Herley's  primary  efforts are focused on
engineering design and product development activities rather than pure research.
A substantial  portion of Herley's  development  activities  have been funded by
Herley's  customers.  Certain of Herley's officers and engineers are involved at
various times and in varying degrees in these activities.  Herley's policy is to
assign the required  engineering and support people,  on an ad hoc basis, to new
product  development  as needs  require  and budgets  permit.  The cost of these
development activities, including employees' time and prototype development, net
of amounts paid by  customers,  were  approximately  $1,685,000  in fiscal 1999,
$1,562,000 in fiscal 1998 and $1,828,000 in fiscal 1997.

     Government Contracts

     A substantial part of Herley's sales are made to U.S. government  agencies,
prime  contractors  or   subcontractors  on  military  or  aerospace   programs.
Government  contracts  are  awarded  either on a  competitive  bid basis or on a
negotiated  sole  source  procurement  basis.  Contracts  awarded on a bid basis
involve several  competitors bidding on the same program with the contract being
awarded  based  upon  price and  ability  to  perform.  Negotiated  sole  source
procurement  is  utilized  if the  Company  is  deemed by the  customer  to have
developed  proprietary equipment not available from other parties or where there
is a very stringent delivery schedule.

     Substantially  all of the  Company's  government  contracts are fixed price
contracts,  some of which  require  delivery  over time periods in excess of one
year. With this type of contract,  Herley agrees to deliver  products at a fixed
price except for costs incurred because of change orders issued by the customer.

     In  accordance  with  Department  of  Defense  procedures,   all  contracts
involving  government programs may be terminated by the government,  in whole or
in part, at the  government's  discretion.  In the event of such a  termination,
prime contractors on such contracts are required to terminate their subcontracts
on the program and the  government  or the prime  contractor is obligated to pay
the costs incurred by Herley under the contract to the date of termination  plus
a fee based on the work completed.

     Business Acquisition

As of January 4, 1999,  the  Company  completed  the  acquisition  of all of the
issued and outstanding common stock of General Microwave Corporation, a New York
corporation,  including  outstanding  stock  options,  for  $18.00 per share and
966,675  three-year  warrants to purchase one share of Herley's common stock, at
an aggregate  purchase price of  approximately  $24,556,000.  The purchase price
includes  shares of common  stock of  General  Microwave  purchased  in the open
market,  acquisition  of the remaining  shares of common stock  outstanding,  an
estimate of the fair market value of the warrants  based on the trading price of
similar warrants currently on the market, and transaction expenses. The warrants
are  exercisable  at $15.60  per share of common  stock of Herley  and expire in
January 2002.
<PAGE>
General Microwave  designs,  manufactures and markets  microwave  components and
subsystems,  and related  electronic  test and  measurement  equipment.  General
Microwave is  headquartered  in  Farmingdale,  New York,  and operates two other
facilities, one in Billerica,  Massachusetts, and one in Israel. The transaction
has been accounted for under the purchase method.

     Marketing and Distribution

     Herley's marketing  approach is to determine  customer  requirements in the
developmental  stages of a program.  Marketing and  engineering  personnel  work
directly   with   the   customer's   engineering   group  to   develop   product
specifications.  Herley receives its awards based upon an evaluation of a number
of factors, including:

 .   technical ranking;
 .   price;
 .   overall capability; and
 .   past performance.

Follow-up contracts and options on the same program are normally negotiated with
customers rather than being subject to a competitive bidding process.


                                 USE OF PROCEEDS

     Herley  will not  receive  any  proceeds  from this  offering.  Herley will
receive $15.60 per share upon exercise of the common stock purchase warrants.

                    PRICE RANGE OF COMMON STOCK AND WARRANTS

     Herley's  common  stock is traded in the Nasdaq  National  Market under the
symbol HRLY and the warrants are traded in the Nasdaq  National Market under the
symbol  HRLYW.  The  following  table sets forth the high and low sales price as
reported by the Nasdaq  National Market for the Herley common stock and warrants
for the periods  indicated and gives  retroactive  effect to the  four-for-three
stock split of the common stock on September 30, 1997.

                                  Common Stock
                                  ------------
<TABLE>
<CAPTION>
                                            High               Low
                                            ----               ---
Fiscal Year 1998
       <S>                                 <C>                <C>
       First Quarter                       $15.00             $10.13
       Second Quarter                       14.75              10.50
       Third Quarter                        14.69              10.88
       Fourth Quarter                       14.25               8.63
<PAGE>


       Fiscal Year 1999
       First Quarter                       $10.50              $7.63
       Second Quarter                       15.31               9.56
       Third Quarter                        15.13              11.13
       Fourth Quarter                       16.19              11.50

Fiscal Year 2000
       First Quarter                        15.00              12.94
       Second Quarter
       (through January 11, 2000)           15.38              11.06

                                    Warrants
                                    --------
                                            High                Low
                                            ----                ---
Fiscal Year 1998
       First Quarter                   Not Traded         Not Traded
       Second Quarter                       $2.00              $1.31
       Third Quarter                         2.91               1.69
       Fourth Quarter                        2.31                .81

Fiscal Year 1999
       First Quarter                        $1.06               $.41
       Second Quarter                        1.94                .50
       Third Quarter                         1.84               1.00
       Fourth Quarter                        2.00                .72

Fiscal Year 2000
       First Quarter                         1.13                .28
       Second Quarter
       (through January 11, 2000)             .38                .03
</TABLE>

     The closing  price of the common stock on January 11, 2000 was $15 1/16 and
the closing  price of the warrants was $1/32.  As of January 11, 2000 there were
approximately  1,000  record  holders of the common stock and  approximately  80
recordholders of the warrants.

                                 DIVIDEND POLICY

     Herley has never paid any cash  dividends on its Common  Stock.  There have
been no stock  dividends  declared or paid by Herley on its common  stock during
the past two years  except for a  four-for-three  stock split on  September  30,
1997.  Payment of future dividends,  if any, will be dependent upon the earnings
and  financial  position  of Herley and such  factors as the Board of  Directors
shall deem appropriate.

                                PERFORMANCE CHART

     The following graph sets forth the cumulative total  stockholder  return to
Herley's  stockholders during the five-year period ended August 1, 1999, as well
as an overall  stock market index  (NASDAQ  Stock  Market-US)  and Herley's peer
group index (S&P Aerospace/Defense):
<PAGE>
                COMPARISON OF FIVE YEAR CUMULATIVE TOTAL RETURN*
       AMONG HERLEY INDUSTRIES, INC., THE NASDAQ STOCK MARKET-US INDEX AND
                        THE S & P AEROSPACE/DEFENSE INDEX
<TABLE>
<CAPTION>
                             Cumulative Total Return

                                    7/94     7/95     7/96     7/97     7/98    7/99

<S>                                <C>      <C>      <C>      <C>      <C>      <C>
Herley Industries, Inc.            100.00   136.51   222.22   352.38   336.52   469.84
Nasdaq Stock Market (U.S.)         100.00   140.40   152.98   225.75   265.75   379.01
S&P Aerospace/Defense              100.00   148.90   193.21   273.78   208.03   217.78

- -----------------
<FN>
* $100.00 invested on July 31, 1994 in stock or index, including reinvestment of
dividends. Fiscal year ending July 31.
</FN>
</TABLE>
                            DESCRIPTION OF SECURITIES

Capital Stock

     Herley's  authorized  capital stock consists of 20,000,000 shares of Herley
common stock, $.10 par value per share.

Common Stock

     General.  Herley has 20,000,000  authorized  shares of Herley common stock,
4,561,690 of which were issued and  outstanding  on January 11, 2000. All shares
of Herley common stock currently  outstanding are validly issued, fully paid and
non-assessable,  and all shares which are the subject of this  prospectus,  when
issued and paid for upon the exercise of the warrants,  will be validly  issued,
fully paid and non-assessable.

     Voting  Rights.  Each  share of Herley  common  stock  entitles  the holder
thereof  to  one  vote,  either  in  person  or by  proxy,  at  meetings  of the
stockholders.  Herley's Board of Directors  consists of three  classes,  each of
which  serves  for a  term  of  three  years.  At  each  annual  meeting  of the
stockholders  the  directors in only one class will be elected.  The holders are
not  permitted to vote their shares  cumulatively.  Accordingly,  the holders of
more than 50% of the outstanding  shares of Herley common stock can elect all of
the directors of Herley standing for election at a stockholders' meeting.

     Dividend  Policy.  All  shares  of Herley  common  stock  are  entitled  to
participate  ratably in  dividends  when and as declared  by  Herley's  Board of
Directors out of the funds legally available therefor. Any such dividends may be
paid in cash,  property or additional shares of Herley common stock.  Herley has
not paid any cash  dividends in the past two fiscal years or the current  fiscal
year and  does not  anticipate  that  cash  dividends  will be  declared  in the
foreseeable future.  While Herley declared a four-for-three stock split effected
as a stock dividend effective September 30, 1997, payment of future dividends is
subject to the  discretion of Herley's  Board of Directors and will depend upon,
among other things,  future earnings,  the operating and financial  condition of
Herley,  its  capital  requirements,   general  business  conditions  and  other
pertinent  facts.  Therefore there can be no assurance that any dividends on the
Herley common stock will be paid in the future. See "Dividend Policy."
<PAGE>
     Miscellaneous Rights and Provisions. Holders of Herley common stock have no
preemptive  or other  subscription  rights,  conversion  rights,  redemption  or
sinking fund provisions. In the event of the liquidation or dissolution, whether
voluntary or involuntary,  of Herley,  each share of common stock is entitled to
share ratably in any assets  available for distribution to holders of the equity
of Herley after satisfaction of all liabilities.

     Shares  Eligible for Future  Sale.  Herley has  4,561,690  shares of Herley
common  stock  outstanding,  of which  3,951,297  are freely  tradeable  without
restriction or further  registration  under the Securities  Act,  except for any
shares purchased by an "affiliate" of Herley generally, an affiliate is a person
who  has a  control  relationship  with  Herley  which  will be  subject  to the
limitations of Rule 144 adopted under the Securities  Act. The remaining  shares
are deemed to be  "restricted  securities,"  as that term is defined  under Rule
144.

     In  connection  with the merger of General  Microwave  with a  wholly-owned
subsidiary of Herley,  Herley has issued approximately 966,675 warrants ("Merger
Warrants") to purchase  shares of Herley common stock.  In addition,  Herley has
outstanding  1,265,000  warrants  ("Warrants")  that  will  be  exercisable  for
1,265,000 newly issued shares of Herley common stock which are being  registered
under this prospectus. Upon exercise of those warrants to purchase, all of these
shares of Herley common stock will also be freely tradeable without  restriction
or future registration under the Securities Act.

     In  general,  under  Rule  144  as  currently  in  effect,  subject  to the
satisfaction  of  certain  other  conditions,   a  person  who  owns  restricted
securities  for at least one year is  entitled to sell,  within any  three-month
period,  a number of such  securities that does not exceed the greater of (1) 1%
of the  total  number of  securities  outstanding  of the same  class or (2) the
average weekly trading volume of the securities on all exchanges and/or reported
through the automated  quotation system of a registered  securities  association
during the four calendar weeks preceding the date on which notice of the sale is
filed with the  Commission.  Sales under Rule 144 are also  subject to manner of
sale  provisions,  notice  requirements  and the  availability of current public
information about the issue. In addition,  an affiliate of the issuer is subject
to the  volume  limitations  of  Rule  144  when  selling  both  restricted  and
unrestricted securities. A person who has not been an affiliate of Herley for at
least the three months  immediately  preceding the sale and who has beneficially
owned the securities for at least two years,  however,  is entitled to sell such
securities  under Rule 144 without  regard to any of the  limitations  described
above. Of the 580,393 shares of Herley common stock that  constitute  restricted
securities, 347,171 shares have been held for more than one year.

     No predictions  can be made as to the effect,  if any, that sales of shares
of Herley common stock under Rule 144 or otherwise or the availability of shares
for sale will have on the market, if any, prevailing from time to time. Sales of
a substantial  number of shares of the Herley common stock  pursuant to Rule 144
or otherwise may adversely affect the market price of the Herley common stock or
the warrants.

Description of Warrants

     The following is a brief summary of certain  provisions of the Warrants and
of the Merger Warrants issued in connection with the merger of General Microwave
and a  wholly-owned  subsidiary  of Herley.  This summary is not complete and is
qualified in all  respects by  reference to the warrant  agreement A copy of the
warrant  agreement has been filed as an exhibit to the  registration  statement.
The Warrants are a different  class than the Merger  Warrants.  The Warrants are
currently  listed and  traded on the Nasdaq  National  Market  System  under the
symbol  HRLYW and the Merger  Warrants  are  currently  listed and traded on the
<PAGE>
Nasdaq National Market System under the symbol HRLYZ.  The terms of the Warrants
and the Merger Warrants are virtually  identical  except for the following:  (i)
the Warrants  expire January 16, 2000 and the Merger  Warrants expire in January
2002; (ii) the Merger Warrants are redeemable,  in whole or in part, at any time
after 21  months  from  their  issuance  at a price of $1.00 per share of common
stock by delivery of 30 days' written  notice if the average last reported sales
price of the Herley common stock has not been less than $17.60 per share for the
fifteen consecutive trading days immediately prior to the notice date.

     Exercise  Price and Terms.  Each  Warrant  entitles the  registered  holder
thereof to purchase  one share of Herley  common  stock at an exercise  price of
$15.60 per share subject to adjustment in accordance with the  anti-dilution and
other  provisions  referred to below.  Prior to January 16,  1999,  the exercise
price was $14.40 per share.  The holder of any Warrant may exercise such Warrant
by  surrendering  the  certificate  representing  the Warrant to American  Stock
Transfer & Trust Company,  the warrant agent,  with the subscription form on the
Warrant properly  completed and executed,  together with payment of the exercise
price.  The  Warrants  may be  exercised  at any time in whole or in part at the
exercise  price then in effect until  expiration of the  Warrants.  The Warrants
expire  January 16, 2000. No fractional  shares will be issued upon the exercise
of the Warrants.

     The exercise price of the Warrants bears no  relationship  to any objective
criteria of future value. Accordingly, such exercise price should in no event be
regarded as an indication of any future trading price.

     Adjustments.  The exercise  price and the number of shares of Herley common
stock  purchasable  upon the exercise of the Warrants are subject to  adjustment
upon the occurrence of certain events, including:

 .    stock dividends;
 .    stock splits;
 .    combinations or reclassifications of the Herley common stock; or
 .    sale by Herley of shares of its  Herley  common  stock or other  securities
     convertible  into Herley common stock, at a price below the market price of
     the Herley common stock, as defined in the warrant  agreement,  except that
     no  adjustment  is required for the issuance of shares upon the exercise or
     conversion of outstanding  options,  warrants and  convertible  securities.
     Additionally, an adjustment would be made in the case of:

 .    a reclassification  or exchange of Herley common stock;
 .    consolidation or merger of Herley with or into another corporation; or
 .    sale of all or substantially all of the assets of Herley in order to enable
     warrant  holders to acquire the kind and number of shares of stock or other
     securities  or property  receivable in such event by a holder of the number
     of shares of Herley common stock that might  otherwise  have been purchased
     upon the exercise of the warrant, except that no adjustment is required for
     a consolidation or merger in which Herley is the continuing corporation.

     Transfer,  Exchange and Exercise.  The Warrants are in registered  form and
may be presented to American Stock  Transfer for transfer,  exchange or exercise
at any time on or prior to their  expiration  date,  at which time the  Warrants
become wholly void and of no value. If a market for the Warrants  develops,  the
holder  may sell the  Warrants  instead  of  exercising  them.  There  can be no
assurance, however, that a market for the Warrants will develop or continue.

     Warrant Holder Not a  Stockholder.  The warrants do not confer upon holders
any voting, dividend or other rights as stockholders of Herley.
<PAGE>
                              PLAN OF DISTRIBUTION

     The shares of common stock are traded on the Nasdaq  Stock Market  National
Market  System under the symbol  HRLY.  The shares may be sold from time to time
directly   by  the   selling   securityholders.   Alternatively,   the   selling
securityholders   may  from  time  to  time   offer  such   securities   through
underwriters,  dealers or agents.  The distribution of securities by the selling
securityholders  may be effected in one or more transactions that may take place
on the Nasdaq Stock Market National Market System,  including  ordinary broker's
transactions,  privately-negotiated transactions or through sales to one or more
broker-dealers  for  resale of such  shares  as  principals,  at  market  prices
prevailing  at the time of sale,  at prices  related to such  prevailing  market
prices or at negotiated prices.  Usual and customary or specifically  negotiated
brokerage  fees or  commissions  may be paid by the selling  securityholders  in
connection with such sales of securities.

     At the time a particular offer of securities is made by or on behalf of the
selling   securityholders,   to  the  extent  required,  a  prospectus  will  be
distributed  which will set forth the  number of shares  being  offered  and the
terms of the offering, including the name or names of any underwriters,  dealers
or  agents,  if any,  the  purchase  price  paid by any  underwriter  for shares
purchased from the Selling  Securityholders  and any  discounts,  commissions or
concessions  allowed or reallowed or paid to dealers,  and the proposed  selling
price to the public.

                                  LEGAL MATTERS

     Certain legal matters in connection  with this offering will be passed upon
for Herley by Blau, Kramer, Wactlar & Lieberman,  P.C., Jericho, New York 11753.
David H. Lieberman, a member of the firm, is a director of Herley. Mr. Lieberman
owns 600 shares of common  stock of Herley and options and  warrants to purchase
17,333 shares of common stock.

                                     EXPERTS

     The financial  statements  included in this prospectus and elsewhere in the
registration  statement have been audited by Arthur Andersen,  LLP,  independent
public accountants,  as set forth in their reports. In those reports,  that firm
states that with  respect to the Israel  subsidiary  its opinion is based on the
reports of other  independent  public  accountants,  Deloitte & Touche LLP.  The
financial  statements  referred to above have been  included  herein in reliance
upon the authority of those forms as experts in giving said reports.

                       WHERE YOU CAN FIND MORE INFORMATION

     Herley has filed with the Securities and Exchange  Commission,  Washington,
D.C., a registration statement under the Securities Act of 1933, with respect to
the common stock offered by this prospects. This prospectus does not contain all
the information set forth in the  registration  statement and its exhibits.  For
further information about Herley and the common stock offered by this prospectus
reference is made to the registration statement and its exhibits.  Statements in
this  prospectus  about the contents of any  contract or other  document are not
necessarily  complete and in each instance Herley refers you to the copy of such
contract or other document filed as an exhibit to the registration statement for
a full statement of the provisions of that contract or document.

     Herley is  subject  to the  informational  requirements  of the  Securities
Exchange Act of 1934, as amended.  In accordance  with the Exchange Act,  Herley
files reports,  proxy statements and other information with the Commission.  You
may read and obtain copies of any materials  filed by Herley with the Commission
at the Commission's Public Reference Room at 450 Fifth Street, N.W., Washington,
<PAGE>
D.C.  20549 and at the  Commission's  Regional  Offices at  Northwestern  Atrium
Center, 500 West Madison Street, Suite 1400, Chicago,  Illinois 60661-2511 and 7
World Trade Center,  New York, New York 10048. You may obtain information on the
operation of the Public  Reference  Room by calling the Commission at 1-800-SEC-
0330.  Copies of such  material  can also be obtained  from the  Securities  and
Exchange Commission's Web site at the address http://www.sec.gov.

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

     The  following  documents  have been  filed by Herley  with the  Commission
pursuant to the Exchange Act, are  incorporated  by reference in this prospectus
and shall be deemed to be a part of this prospectus:

     (1) Herley's Annual Report on Form 10-K for the fiscal year ended August 1,
1999.
     (2) Herley's  Quarterly  Report on Form 10-Q for the quarter  ended October
31, 1999.
     (3) The  description  of the class of  securities  to be  offered  which is
contained in a Registration  Statement  filed under Section 12 of the Securities
and Exchange Act of 1934 (registration statement No. 333- 39767),  including any
amendment or report filed for the purpose of updating such description.

     All documents  filed pursuant to Section 13(a),  13(c),  14 or 15(d) of the
Exchange Act after the date of this  prospectus and prior to the  termination of
this offering shall be deemed to be incorporated by reference in this prospectus
and to be part of this prospectus from the date they are filed.

     Any  statement  contained  in a  document  incorporated  or  deemed  to  be
incorporated by reference in this  prospectus  shall be deemed to be modified or
superseded  for  purposes of this  prospectus  to the extent that a statement in
this prospectus or in any subsequently  filed document that also is or is deemed
to be incorporated  by reference in this prospectus  modifies or supersedes that
statement.  Any statement  which is modified or superseded  shall not be deemed,
except as so modified or superseded, to constitute a part of this prospectus.

     Herley will  provide  without  charge to each person to whom a copy of this
prospectus is delivered, upon the written or oral request of that person, a copy
of any or all of the documents  incorporated  by  reference;  except that Herley
will not provide exhibits to the documents  incorporated by reference unless the
exhibits are specifically incorporated by reference.  Requests for copies should
be  directed to the  Secretary,  Herley  Industries,  Inc.,  10 Industry  Drive,
Lancaster, PA 17603, (717) 397-2777.
<PAGE>
                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS


Item 14.  Other Expenses of Issuance and Distribution
<TABLE>
<CAPTION>
     <S>                                             <C>
     Securities and Exchange Commission
     Filing Fee. . . . . . . . . . . . . . . . . .     $ 900
     Legal and Accounting Fees . . . . . . . . . .     5,000
     Miscellaneous . . . . . . . . . . . . . . . .     4,100
                                                     -------
     Total . . . . . . . . . . . . . . . . . . . .   $10,000
                                                     =======
</TABLE>

     Herley will pay all of these expenses.

Item 15.  Indemnification of Directors and Officers

     Under  provisions  of the  By-Laws of Herley,  each  person who is or was a
director  or officer of Herley may be  indemnified  by Herley to the full extent
permitted or authorized by the General Corporation Law of Delaware.

     Under such law, to the extent that such person is  successful on the merits
of defense of a suit or  proceeding  brought  against  him by reason of the fact
that he is a director  or officer of  Herley,  he shall be  indemnified  against
expenses (including attorneys' fees) reasonably incurred in connection with such
action.

     If  unsuccessful  in defense of a  third-party  civil suit or if a criminal
suit is settled,  such a person may be  indemnified  under such law against both
(1) expenses (including  attorneys' fees) and (2) judgements,  fines and amounts
paid in  settlement  if he acted in good  faith  and in a manner  he  reasonably
believed  to be in, or not opposed to, the best  interests  of Herley,  and with
respect to any criminal  action,  had no reasonable cause to believe his conduct
was unlawful.

     If  unsuccessful in defense of a suit brought by or in the right of Herley,
or if such suit is settled, such a person may be indemnified under such law only
against  expenses  (including  attorneys'  fees)  incurred  in  the  defense  or
settlement  of such suit if he acted in good faith and in a manner he reasonably
believed to be in, or not opposed to, the best  interests of Herley  except that
if such a person  is  adjudged  to be  liable  in such  suit for  negligence  or
misconduct  in the  performance  of his duty to Herley,  he cannot be made whole
even for expenses  unless the court  determines that he is fairly and reasonably
entitled to indemnity for such expenses.

     Herley and its officers and directors of Herley are covered by officers and
directors liability insurance. The policy coverage is $3,000,000, which includes
reimbursement for costs and fees. There is a maximum deductible under the policy
of $200,000 for each claim. Herley has entered into  Indemnification  Agreements
with  certain  of  its  officers  and  directors.  The  Agreements  provide  for
reimbursement for all direct and indirect costs of any type or nature whatsoever
(including  attorneys' fees and related  disbursements)  actually and reasonably
incurred in  connection  with either the  investigation,  defense or appeal of a
Proceeding, as defined,  including amounts paid in settlement by or on behalf of
an Indemnitee.
<PAGE>
Item 16.  Exhibits

     4.1  Form  of  Warrant   (incorporated  by  reference  to  Exhibit  4.1  to
          registration statement No. 333- 39767)
     4.2  Warrant  Agreement  (incorporated  by  reference  to  Exhibit  4.2  to
          registration statement No. 333-39767)
     5    Opinion of Blau, Kramer, Wactlar & Lieberman, P.C.
     23.1 Consent of Arthur Andersen LLP
     23.2 Consent  of Blau,  Kramer,  Wactlar &  Lieberman,  P.C.  (included  in
          Exhibit 5 hereof)
     24   Powers of Attorney (included in the signature pages hereof)


Item 17.  Undertakings

     (a) The  undersigned  registrant  hereby  undertakes  that, for purposes of
determining  any  liability  under the  Securities  Act of 1933, as amended (the
"Act"),  each filing of the registrant's annual report pursuant to Section 13(a)
or Section 15(d) of the Securities  Exchange Act of 1934 (and, where applicable,
each filing of an employee  benefit  plan's  annual  report  pursuant to Section
15(d) of the Securities  Exchange Act of 1934) that is incorporated by reference
in the registration statement shall be deemed to be a new registration statement
relating to the securities offered therein,  and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

     (b) Insofar as indemnification for liabilities arising under the Act may be
permitted to  directors,  officers  and  controlling  persons of the  registrant
pursuant to the foregoing  provisions,  or otherwise,  the  registrant  has been
advised  that in the opinion of the  Securities  and  Exchange  Commission  such
indemnification  is  against  public  policy  as  expressed  in the  Act and is,
therefore,  unenforceable. In the event that a claim for indemnification against
such liabilities  (other than the payment by the registrant of expenses incurred
or paid by a director,  officer or  controlling  person of the registrant in the
successful  defense of any  action,  suit or  proceeding)  is  asserted  by such
director,  officer or controlling person in connection with the securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been  settled by  controlling  precedent,  submit to a court of  appropriate
jurisdiction the question whether such  indemnification  by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.

     (c) The undersigned Registrant hereby undertakes:

     (1)  For  purposes  of  determining   any  liability  under  the  Act,  the
information  omitted from the form of prospectus filed as part of a registration
statement in reliance upon Rule 430A and contained in a form of prospectus filed
by the  registrant  pursuant to Rule  424(b)(1)  or (4) or 497(h)  under the Act
shall be deemed to be part of the  registration  statement as of the time it was
declared effective.

     (2) For the  purpose  of  determining  any  liability  under the Act,  each
post-effective  amendment that contains a form of prospectus  shall be deemed to
be a new registration  statement relating to the securities offered therein, and
the offering of such  securities  at that time shall be deemed to be the initial
bona fide offering thereof.
<PAGE>
                                   SIGNATURES

     Pursuant to the  requirements of the Securities Act of 1933, the Registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing  on Form S-3 and has  duly  caused  this  registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized, in Lancaster, Pennsylvania on the 13th day of January, 2000.

                                Herley Industries, Inc.

                                By: /s/ Lee N. Blatt
                                   -----------------------------------
                                       Lee N. Blatt
                                       Chairman of the Board

                                POWER OF ATTORNEY

     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
Registration  Statement  has been  signed  below on  January  13,  2000,  by the
following  persons in the  capacities  indicated.  Each person  whose  signature
appears  below also  constitutes  and appoints Lee N. Blatt and Myron Levy,  and
each of them, his true and lawful attorney-in-fact and agent, with full power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all capacities to sign any and all amendments (including  post-effective
amendments)  to this  Registration  Statement,  and to file the  same,  with all
exhibits  thereto and all other  documents  in  connection  therewith,  with the
Commission,  granting  unto  said  attorney-in-fact  and  agent  full  power and
authority to do and perform each and every act and thing requisite and necessary
to be done,  as fully to all  intents  and  purposes  as he might or could do in
person, hereby ratifying and confirming all that said attorney-in-fact and agent
or his substitute or  substitutes  may lawfully do or cause to be done by virtue
hereof.

     Signature                     Title
     ---------                     -----

/s/ Lee N. Blatt                Chairman of the Board
Lee N. Blatt                    (Chief Executive Officer)

/s/ Myron Levy                  President and Director
Myron Levy

/s/ Anello C. Garefino          Vice President - Finance, Treasurer (Chief
Anello C. Garefino              Financial Officer and Principal Accounting
                                Officer)

/s/ Thomas J. Allshouse         Director
Thomas J. Allshouse

/s/ David H. Lieberman          Secretary and Director
David H. Lieberman

/s/ John Thonet                 Director
John Thonet

/s/ Alvin M. Silver             Director
Alvin M. Silver

/s/ Edward K. Walker, Jr.       Director
Edward K. Walker, Jr.
<PAGE>
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D. C. 20549

                                 ---------------



                                    EXHIBITS

                                       to

                                    Form S-3

                             Registration Statement


                                 ---------------

                             Herley Industries, Inc.
             (Exact name of registrant as specified in its charter)


                                                                       EXHIBIT 5


                                       January 14, 2000


Securities and Exchange Commission
450 Fifth Avenue, N.W.
Washington, D.C.  20549

Re:  Herley Industries, Inc.
     Registration Statement on Form S-3
     ----------------------------------

Gentlemen:

     Reference is made to the filing by Herley Industries,  Inc. (the "Company")
of a  Registration  Statement  on Form S-3 (the  "Registration  Statement"),  as
amended,  with the Securities and Exchange Commission pursuant to the provisions
of the  Securities  Act of  1933,  as  amended,  covering  the  registration  of
1,265,000  shares of  Herley's  common  stock,  par value  $.001 per share  (the
"Common  Stock")  issuable upon the exercise of 1,265,000  common stock purchase
warrants (the "Warrants").

     As counsel for Herley,  we have examined its corporate  records,  including
its Certificate of Incorporation,  By-Laws,  its corporate minutes,  the form of
its Common Stock certificate and Warrant certificate and such other documents as
we have deemed necessary or relevant under the circumstances.

     Based upon our examination, we are of the opinion that:

     1.  Herley is duly  organized  and validly  existing  under the laws of the
State of Delaware.

     2. The shares of Common Stock  reserved  for issuance  upon the exercise of
the Warrants  when issued in  accordance  with the terms and  conditions of such
Warrants, will be validly issued, fully paid and non-assessable.

     We hereby  consent  to be named in the  Registration  Statement  and in the
prospectus which constitutes a part thereof as counsel to Herley,  and we hereby
consent  to the  filing  of this  opinion  as  Exhibit  5.1 to the  Registration
Statement.

                                   Very truly yours,


                                   /s/ Blau, Kramer, Wactlar & Lieberman, P.C.



                                                  EXHIBIT 23.1








                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS







As independent  public  accountants,  we hereby consent to the  incorporation by
reference in this registration statement of our report dated September 17, 1999,
included in Herley Industries, Inc.'s Form 10-K for the fiscal year ended August
1,  1999,  and to all  references  to our  Firm  included  in this  registration
statement.


                                        /s/ Arthur Andersen LLP

Lancaster, Pennsylvania
January 14, 2000




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