PROPOSED PURCHASE OF AIR COMMUNICATIONS EQUIPMENT

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP83-00423R001700970004-3
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 3
• Document Creation Date: November 9, 2016
• Document Release Date: February 27, 1999
• Sequence Number: 4
• Publication Date: November 1, 1954
• Content Type: FORM

PGRM N Sl-4B
DEC 1951
Approved For Release 1999010: C(A;RQP~83 00423ROO170097 O-04-3
CENTRAL INTELLIGENCE AGENCY
INFORMATION REPORT
COUNTRY Portu{;al/Portuk ueso India (Goa)
SUBJECT i ,_'Oposed t'i, ~?c nas >s o: JA-111' Co1L Iunicatioas Equipment
PLACE ACQUIRED
(BY SOURCE)
DATE ACQUIRED
(BY SOURCE)
DATE (OF INFO.)
25X1A6a
Oct - 1ov 54
25X1X6
THIS IS UNEVALUATED INFORMATION
25X1X6
the technical characteristics of the air communications cou:oriment which they
requested are quoted below:
(e) "One nondirectional radio beacon.
(1) It is intended that this nondirectional radio beacon should include one
service transmitter and one reserve transmitter with appropriate auto-
matic controls and. auxiliary equipment.
(2) Transmitting type: Al/Ao.
an alternate is necessary, the A2/Ao should be quoted. However,
the modulation system in this variation must be fairly simple and eco-.
aoeu.cal, modulating, for instance, in the screen-;.;rid of the pre-final
ota;e with the final stage in Class C as is usual in equipment of this
~;.ina.
'J)
Output power shoulc be provided in the amount o l" two to three 1-ar
delivered at the antenna circuit, or an alternate proposal for about
five -w delivered in the antenna circuit.
Frequency range: 200/00 Yc, but the proposal should indicate the
frequency stability guaranteed by the manufacture:.
Antenna. The proposal should include a vertical antenna of between
,-50 and 60 meters complete with coil, transmission line, lightning
Lad and luminous signaling.
Ground system: 2500 teeters of smooth copper wir with 2. i rlir.?h diameter
r the same quantity of copper ribbon about 15 rL_o wide and 3/10 of a
o
DISTRIB
REPORT NO. 00 -
2
CD NO.
00/C NO.
ORR NO.
DAS N0.
OCI NO.
DATE DISTR.
NO. OF PAGES 3
NO. OF ENCLS.
SUPP. TO
REPORT NO.
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 Approved For Release 1999/09/10 CIA-RDP83-09423R001700970004-3
The should be lbropicali-ed finished.
(8) The identification signal and the transmitting characteristics must
observe the specifications of the OACI.
(9) Power source: Alternating current (50-60 cycleg),110/220 volts, single
phase (in cases where the proposals provide for lower power) or 220/380
volts, three phase (for those proposals designating; greater power).
(b) "Two VHF transmitters for terminal mobile service
(1) It is intended that these transmitters be of the usual type which comprise
complete transmitting stations (including suitable racks and storage space
with one microphone for each).
(2) Transmitting type: A3-
(3) Output power: 50 watts (delivered at the antenna)
(1E) Frequency range: 1.18-132 mcs. (Please indicate the guaranteed. frequency
stability)
(5) At present our plans are for sing:Le frequency transmitters, however, we
shall accept proposals for variable frequency transmitters with either
manual or automatic controls.
(6) Transmitter control. should be local and the control mechanism must permit
the instantaneous utilization of the transmitters. Bids will be accepted,
however, on remote control units, although the cost factor should be borne
in mind.
(7) The equipment should include tropicalized finishing.
(8) The antenna with reflector should be finished with 50 meters of coaxial
cable and connectors.
(9) Power source: 110/220 Volt, AC single phase (50-60 cycles).
(c) "One VHF transmitter for route mobile service.
(1) This equipment should include a multi channel transmitter for use in route
telephonic service which may also serve as a reserve for the fixed radio
telegraphic service. With this transmitter must be furnished one microphone
manipulator key and a remote control unit.
(2) Transmitting type: Al and A3-
(3) Output power: About 2-3 kw (delivered at the antenna).
(2) Frequency range: 2-18 kc (coils must be included).
Number of channels: 4 - 10. The transmitter must be furnished with a set
of 10 crystals and the frequency stability should be guaranteed by the
manufacturer.
(6) Transmitter control: Remote control.
7) Tropicalized finish.
(8) Power source: 220/380 Volt, AC three phase.
(d.) "One 19 transmitter for fixed service.
(1) This should. be a multi channel transmitter with each channel having, an
output for an antenna, and should be independent aid balanced for use in
manual radio telegraphic service.
(2) Transmitting type: Al
Approved For Release 1999/09/10 : CIA-RDP83-00423R001700970004-3
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 Approved For Release 1. 99/09/1 Q_: CIA-RDP83-Q0423R001700970004-3
(3)
(1+)
(5)
Output power: 2-3 kw (delivered at the antenna). The alternate proposal
should be submitted for five kw transmitters (delivered at the antenna).
Frequency range: 2-18 mcs (including coils)
Number of channels: Four with the possibility that at least two of them can
work simultaneously. The transmitters should be urnished with a set of
1.0 crystals and the frequency stability should be guaranteed.
(6) Transmitter control: Remote control.
(7) Tropicalized finishing.
(8) Power source: 220/380 volts, AC three phase.
"Two V1D? receivers (one of which is designed for fixed tuning and one for
variable tuning).
(1)
(3)
Frequency range: 118-132 mcs.
The antenna of each receiver should be furnished 1ith 50 meters of coaxial
cables and connectors.
Tropicalized finishing.
(1+) Power source: 110/220 volts, AC single phase.
(f) "Three Imo' receivers with variable tuning.
(1) Frequency range: 2-30 mcs with one receiver covering the range from 200-
40O kc.
(2) The receivers should be equipped with the following- antennas:
a. 75 ohms coaxial
b. Single wire 150 ohms
c. Double wire 600 ohms
(3) Tropicalized finishing."
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25X1X
T /' aTC nNiY
Approved For Release 1999/09/10 : CIA-RDP83-00423R001700970004-3