(SANITIZED) TYPE 106 RADIO DIRECTION FINDER

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03424A000700060001-9
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 2
• Document Creation Date: December 23, 2016
• Document Release Date: August 15, 2013
• Sequence Number: 1
• Publication Date: February 20, 1952
• Content Type: MEMO

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Declassified in Part- Sanitized Copy Approved for Release 2013/08/15: CIA-RDP78-03424A000700060001-9
MEMORANDUM FOB 7113
SUBJECT:
444
alsora,
7ebruary 1952
Type 106 Radio Direction Tinder_
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1. According to an Engineering Division
ment be modified for the following requirements -
High frequency coverage - probably to 22 Mc.
A. C. Powered;
information vas obtained from
n a telepho
50X1
conversation on 19;;;.-u-ay 50X1
(Chief Engineer of 50X1
1952, as follow:
a. Provision can be made to adapt the Type 106 unit for use on
frequencies as high as 22 megacycles in bands of a width of approxi-
mately 1.5 to 2 octaves per loop antenna using as many loops as
required by frequency coverage. It is proposed that the basic 108
be used as an IS. section and an additional cabinet approximately
8" x 10" x 10" be built to house an:R.7. tuning unit with a band
&Witch covering frequency ranges desired which will function as a
converter. In this cabinet will be installed an A.C. power supply
capable of powering the entire system.
b. The loop (or loops) can be mounted outdoors at a distance of
up to 25 feet and direction finding would be accomplished by opera-
tion of a goniometer mounted in the B.F. tuning cabinet.
c. The high frequency loops would be of em approximate diameter
of one and a hal f feet each.
d. The present cost of the Type 106 (unmodified) is $1,280.
No estimate can be given on modification costs because of preliminary
engineering work which Is necessary and this Agency would ,be expected
to withstand their research expense. The unit cost with production
rune would be determined at a later date, depending on the number of
units required.
e. The first prototype can be provided in approximately 6
months.
2. In view of the above facts, it seems that the finished equipment
would become three separate units composed of the Basic 106 section, an
B.7. tuning unit and a separate loop for each band of operation with
Declassified in Part - Sanitized Copy Approved for Release 2013/08/15: CIA-RDP78-03424A000700060001-9
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Declassified in Part - Sanitized Copy Approved for Release 2013/08/15:
CIA-RDP78-03424A000700060001-9 ir.ere-14
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many connecting cables, making it cumbersome for installation and con-
. siderably expensive for the initial cost.
3. It is felt by of the Policy and Plans Division, 50X1
, as well as the Plant Engineering Branch of the Engineering Division, that
these modifications yould not answer our needs adequately for a low cost,
compact and full coverage Direction Finding unit.
Declassified in Part - Sanitized Copy Approved for Release 2013/08/15:
CIA-RDP78-03424A000700060001-9
50X1