FIXED FREQUENCY REFERENCE OSCILLATOR

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03535A000600080021-3
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 4
• Document Creation Date: December 22, 2016
• Document Release Date: April 11, 2012
• Sequence Number: 21
• Publication Date: March 20, 1956
• Content Type: MEMO

Declassified in Part - Sanitized Copy Approved for Release 2012/04/11: CIA-RDP78-03535A000600080021-3
ROUTING AND. RECORD SHEET
INSTRUCTIONS: Officer designations should be used in the "TO" column. Under each comment a line should be drawn across sheet
and each comment numbered to correspond with the number in the "TO" column. Each officer should initial (check mark insufficient)
before further routing. This Routing and Record Sheet should be returned to Registry.
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Declassified in Part - Sanitized Copy Approved for Release 2012/04/11: CIA-RDP78-03535A000600080021-3
 Declassified in Part - Sanitized Copy Approved for Release 2012/04/11: CIA-RDP78-03535A000600080021-3
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Declassified in Part - Sanitized Copy Approved for Release 2012/04/11: CIA-RDP78-03535A000600080021-3
 Declassified in Part - Sanitized Copy Approved for Release 2012/04/11: CIA-RDP78-03535A000600080021-3
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STANDARD FORM NO. 64
Lull I
Office Memorandzm ? UNITED STATES GOVERNMENT
SPX 6-527
TO : Chief, Communications Engineering Division DATE: 20 March 1956
FROM : Chief, Supplemental Programs Division, OC
SUBJECT: Fixed Frequency Reference Oscillator
can be made. At the present time those services engaged in collec-
tion are using either a manually struck tuning fork or a rather
oversized electrically driven fork oscillator. Both methods are
unsatisfactory on a number of counts --- awkward to handle, too
much bulk, and represent additional weight.
2. The solution of the problem lies in the development of a
miniature oscillator possessing the following characteristics:
a) Size should not exceed 3 x 2 x 1 inches.
b) Life not less than 24 hours.
c) Frequency - 1000 cps (0 - 1000 F)
d) Stability - 1.10-4
3. Because this unit is intended only to inject a reference
tone, one control, i.e., push-button, is necessary. Its output
level should be sufficient to drive a miniature recorder or "telex"
headset. There are a number of circuits such as phase shift, transitron
and crystal oscillators which have been practically configured with
stabilities exceeding 10-"1. Recent periodicals have announced the
commercial availability of audio crystals in a size suitable for this
application.
4. This Division has operations in the field requiring such a
reference generator and is planning several for the immediate future.
Therefore, it is requested that your Division undertake the fabrica-
tion of five oscillators. Four will be dispatched to the field for
operational support, the fifth will be retained as a -prototype for the
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Distribution
Orig & 1 - Addressee
Declassified in Part - Sanitized Copy Approved for Release 2012/04/11: CIA-RDP78-03535A000600080021-3
 Declassified in Part - Sanitized Copy Approved for Release 2012/04/11: CIA-RDP78-03535A000600080021-3
James Knights Co.
Sandwich, Ill
Low Freq Range (100C Cycles)
Miniaturised
Stability t .0001 % over an ambient range of -55 to +50
Packaged in glass enclosed vacuum or Nail type HC13U holder
This information published in
ELECTRONICS MARCH 1956 Page 358
Other available information also in
ELECTRONICS APRIL 1956 Page 356
and
ELECTRONICS BUYERS GUIDE JUNE 1955 Page 624
Declassified in Part - Sanitized Copy Approved for Release 2012/04/11: CIA-RDP78-03535A000600080021-3