TYPES OF RADAR/IFF ANTENNA/ANTI-AIRCRAFT SCHOOL

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80T00246A000600920001-3
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 8
• Document Creation Date: December 21, 2016
• Document Release Date: July 29, 2008
• Sequence Number: 1
• Publication Date: February 26, 1957
• Content Type: REPORT

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USAF review completed. ARMY review
completed.
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~C-O-N F-I D E-N-T-I A L SEE BOTTOM OF PAGE FOR SPECIAL CONTROLS:, IF ANY
tN FO R M AT I O N REPORT
This material contains information affecting `the
National Defense of the United States within the
meaning of the Espionage Laws, Title 18, U.S.C.
PREPARED AND DISSEMINATED BY
Secs. 793 and 794, the transmission or revelation
CENTRAL INTELLIGENCE AGENCY
of which in any manner to an unauthorized per-
son is prohibited by law.
COUNTRY
Hungary
SUBJECT
DATE DISTRIBUTED 26 57 25X1
Feb
!
Types of Radar/IFF Antenna/Anti-Aircraft School
NO. OF PAGES
NO. E
:CLS.
2
SUPPLEMENT TO REPORT # 25X1
THIS IS
this report is the result of a joint collection effort by the Air Force, the 25X1
Army and CIA and is disseminated in accordance with the provisions of NSCID ,#7_]
ARMY review completed. USAF review completed.
1. Duna is the Hungarian name given to a short range warning and artillery fire
control radar set very well known in Hungary. It is estimated that approxima-
tely 60 to 65 such sets are inexistence in the country. The secret name
given to this equipment is ttMOSZT-2" which is only found on top secret blue-
prints and nomenclaturesm
2. Following are the technical and operational characteristics of this set:
Operating frequency: 3,000 Mc/s
Approximate range: 80 kilometers
Type oscillator: Magnetron
Type antenna: Double deck, four horizontally polarized, six-element
Yagi arrays
Type scope: PPI-6
Power supply: "Czonkatt Hungarian-make motor turning a 110-volt (dc)
generator.
3. Although the performance of Duna is very satisfactory, the operating personnel
seem to have difficulties because of breaking of the antenna elements or
because of faulty parts such as tubes, resistors, condensers, etc.
4. Drava is the Hungarian name given to a modified US type anti-aircraft fire
control radar set. There are approximately 20 Drava sets in operation in the
country. IISZON- " is the secret name given to this set which is found only
on top secret blueprints and nomenclatures.
5. Drava has the following technical and operational characteristics:
Operating frequency: 3,000 Mc/s
Ranges: 55 Km for warning and 35 Km for fire control
Scope type: PPI-6
Oscillator: Magnetron
Antenna: Parabolic reflector
Power supply: 110 volts dc
C-O-N F-I D E-N-T-I A-L
STATE I I ARMY I NAVY I I AIR I I
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6. This equipment is capable of directing a group of four to six 85 mm anti-aircraft
guns simultaneously, and has these advantages over the original US set:
(a) A third bean called the micro-beam (30 to 45 meters narrow) for
better focusing.
(b) Automatic target-selecting capability
c Automatic fire synchronization with anti-aircraft batteries.
Hungary is manufacturing these sets for other satellite countries.
8. "STAN-9" ' Anti Aircraft Radar -
a new type of Soviet-built anti-aircraft radar set called 25X1
"SZAN@9" (Secret name) which is said to be much more accurate than the Drava..
This equipment weighs about 30 tons and is mounted on a van.
FMV, the Hungarian Precision Mechanical Industry, is being glVen the
responsibility for the manufacturing of these sets.
9. The P-20 is a huge Soviet-built early-warning and ground control intercept
radar used by most of the satellite countries. It is a rugged piece of
equipment and can be used on any type of terrain. The complete installation,of
this set is composed of five units. (1) The antenna trailer, '(2) the trans-
mitter truck, (3) the receiver truck, (if) the power-gating truck, and
(5) :a `mazntenanae truck. The. Pm20 ' has a maximum - reliable .
range of about 300 kilometers and uses 5 magnetrons in the oscillor staged
IFF (-Identification Friend or Poe) -System -
10. NRZ is the name of this Soviet-manufactured equipment which is usually used
in conjunction with P-20 type radar. The antenna, which consists of two
vertically polarized Yagi arrays mounted in parallel and backed by a screen
reflector, is installed at an approximate distance of 100 to 200 meters from
the P-20 installations. Both the NRZ and P-20 antennas have a synchronized
rotating system. A small motor places underneath the antenna, elements of the
N-. B -Z . ' :sexes . _t6 rotate . .-the-. mechanism. No personnel is
required at the NRZ site. Aircraft are identified by means of certain types
of radio signals generated by the planes and picked up by the NRZ antenna and
transmitted to the receiving unit of the P-20 through coaxial cables.
Anti-Aircraft School in Budapest
U. This is an officers, technical school called the Kossuth Academy located at
133 Ulloi Street,~in the 9th district of Budapest, where radar, field artillery
and 9snti-aircraft technical and tactical courses are taught. Radar classes
require three years for graduation. The courses taught consist of the
following: First pear: beginners' class basic radar courses, 25 students;
Second Year; anti-aircraft and short and long range radar warning courses,
32 students; Third 'and, last year. anti aircraft and radar warning courses, 40
students.
1. Sketch of the Duna radar antenna
2. Source's sketch of SZOND9 anti-aircraft radar
3. Sketch of the P.20 early warning radar setup.
4. Sketch of IFF antenna.
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REC LI. vER
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"P-20"EEQLy WARNIN.R WADFQ SET-UP
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PO wEz
Sv PPLY
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Confidential
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IRA 71 I.P.F. (C.oDENMi "NRZ?) ANTENNA
ident"
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