CONTRACT (SANITIZED), TASK VI

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03424A001300090010-9
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 2
• Document Creation Date: December 23, 2016
• Document Release Date: January 15, 2014
• Sequence Number: 10
• Publication Date: February 28, 1956
• Content Type: LETTER

Declassified in Part- Sanitized Copy Approved forRelease2014/01/15 : CIA-RDP78-03424A001300090010-9
571174-11? REV
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NEXT REV 2-0/0
JUST
C
Mil : H 10?2
Washington, D. C.
Attention:
Referencel
Dear
Task Tir\\
28 Failryarr_1256
6991
We have been making a search in the four frequency bands which were
suggested as possible areas in which we might operate. The results of
a 4.day search which began on 24 February 1956 and continued daily through
27 February 1956 ants
A. 2000. .2065. kcs
Only on 2000 kcs was any appreciable activity noted in this band
during the daily period of observation.-namely 0830 hours--16,i5
hours. This band appears to be quite clear.
B. 2105. - 2135. kos
Fairly active operations were observed at about 2107 kcs, at 2190
kos, at 2300 kcs and at 2327 kcs. At other areas within this band,
there was no activity noted during the daily period of observation,
0830 hours . 1645 hours.
C. 2505. - 2855. kos
This entire band appeared to be quilts active. At no time during
the daily period of observation, 0830 0 1645 hours, VW there any
clear channel mted.
D. )155._. A240. kos
There vas considerable activity noted at 3160 kcs, at 3180 kcs, at
3200 keg, at 3215 and at 3240 kes. The other areas 'within this band
appeared to be clear during the daily observation period, 0830 .
1645 houre.
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090010-9
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090010-9
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Page 2
It is particularly interesting to note that the most favorable
areas are found in the lower two bands considered. These also are the
desired regions for our particular type of operation.
It is hoped that you maybe able to obtain frequencies for use on
this project in the areas mentioned. Possibly you could be successful
in obtaining a selection of 6 frequencies, thus having an alternate set
available in the event of unexpected interference appearing. In consid-
ering the frequencies, the following are suggested as possibly being
available and desirable.
Master Slave 1 S)ave 2
(a) 3170 2015 2135
(b) 3230 (alternate) 2050 2225
It is desired to have as wide a separation as practical between the
Master? transmission and the "Slave.' It is believed desirable that a
bandwidth of 40 to 45 kcs be allowed for the transmissions.
The frequencies listed are suggestions only. It is appreciated that
the resultt of the search made at the other sites may indicate a different
choice of frequencies.
It would be appreciated if you 'would kindly advise us promptly as to
frequencies selected together with notice of authorisation to use. We
must order new crystals as well as modify the transmitters to operate at
the new frequencies. This will take a short time, but we wish to get it
done as quickly as possible.
With kind wishes.
User
Dist: oric. a 1 -
1 cc - file
Sincerely yours,
Declassified in Part - Sanitized Copy Approved for Release 2014/01/15: CIA-RDP78-03424A001300090010-9