CONTRACT MONITOR AT (SANITIZED)

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03153A002000020006-4
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 1
• Document Creation Date: December 23, 2016
• Document Release Date: May 8, 2014
• Sequence Number: 6
• Publication Date: September 16, 1953
• Content Type: MEMO

Declassified in Part - Sanitized Copy Approved for Release 2014/05/08: CIA-RDP78-03153A002000020006-4
JUn
SECI1ET
'29:TY INFORMATION
MEMORANDUM FOR: Tat, RECORD
SUBJECT: Contract Monitor at
16 September 1953
1. A iieeting took place between
of
APD on 20 August 1953.
and
and.
of
'2- L Transmitter: A butterfly unit has been built to
act as the tuning circuit of an oscillator powered by a 2C39A vacuum
tube. The frequency range of this oscillator should be from 500 to
2500 megacycles at ten watts power output. For higher frequencies
the possibility of using a traveling wave tube is being investigated
by means of clearances obtained through ONR. Should the use of a
traveling wave tube not prove feasible, an oscillator using a 6BL6
is being built. This unit, however, will not have an output of more
than a few hundred millivolts.
STAT
50X1
STAT
STAT
STAT
50X1
50X1
3. Receiver: The preamplifier on the previous receiver 50X1
has been redesigned and rebuilt. The frequency-band goes now from
1500 to 3500 cycles per second withipeak gain of 140,000. The noise
at the input is about 6 microvolts. An improved feedback circuit
is being studied in order to increase the signal to noise ratio.
An antenna study is also being carried out.
4. The production of the ten units has been completed
and delivered. The drawings and parts list have also been delivered.
By redesigning IF transformers the sensitivity was improved over that _
of the two prototypes.
5. was very helpful in suggesting the best equip-
ment for APD to purchase to setup a microwave lab. Because of the
high cost of signal generators at this frequency it was agreed that
use of the 6BL6 oscillator being designed in conjunction with another
using a 6Bm6 for lower frequencies might prove the most economical
source of RF power for our measurements.
6. Services were performed under the general services contract
for mounting a mirror at the operational testing area.
Distribution:
/Orig. - P-105
1 - P-99
TSS/APD
- 1. DOCUMENT NO.
App _ chiieciE IN CLASS. LI
I. DECLASSIFIED
CLASS. CHANiCED TO: TS S C 20 if .:CURITY INFORMATION STAT
NEXT REVIEW DAT:
!An -7,-1 0
Declassified in Part - Sanitized Copy Approved for Release 2014/05/08 : CIA-RDP78-03153A002000020006-4 /
SECRET
50X1
STAT
STAT
STAT