VARIABLE-FREQUENCY AUDIO OSCILLATOR, IN-1

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03535A000500040003-8
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 4
• Document Creation Date: December 27, 2016
• Document Release Date: September 13, 2012
• Sequence Number: 3
• Publication Date: January 2, 1959
• Content Type: MISC

Declassified in Part - Sanitized Copy Approved for Release 2012/09/13: CIA-RDP78-03535A000500040003-8
PROJECT # 2510
PROJECT TITLE: Variable-Frequency Audio Oscillator, IN-1
NO CHANGE
Tit% document Is fart et an Integated
lite, II separated from the ite t must be
stadeuted to 'individual systematic review.
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Declassified in Part - Sanitized Copy Approved for Release 2012/09/13: CIA-RDP78-03535A000500040003-8
Declassified in Part - Sanitized Copy Approved for Release 2012/09/13: CIA-RDP78-03535A000500040003-8
?Am # 25123
, /..:requency Audio Oscillator, IN-1
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NO MANGE
doeentent ts part al an Merited
SW, ti eiparated from the file fl eud be
ablated to individual syetematie rettleW?
110 CHANGE
Declassified in Part - Sanitized Copy Approved for Release 2012/09/13: CIA-RDP78-03535A000500040003-8
Declassified in Part- Sanitized Copy Approved forRelease2012/09/13 : CIA-RDP78-03535A000500040003-8
NO ORME
V- -1-
The major requirements on this oscillator consist of compactness, (package
dimensions sought are 1." X 2" X 311 a simple, easily read frequency indicator
having a resettability error low enough to be consistent with the required
calibration accuracy of 10% at the low end and 5% at the high end, and
frequency stability of 5% over the temperature range from 0?C to 5000.
To obtain the best compromise between the above requirements, three prototype
models have been constructed and evaluated. Physical dimensions present the
toughtpst problem primarily because of the size of the smAllest suitable
frequency determining potentiometer and the ruggedness required in the case and
mounting arrangement to maintain the gear train alignment and backlash character-
istics required for acceptable resettability.
Evaluation of the IN-1 has established its electrical characteristics to be
within the specifications outlined above. Its dimensions are le X 2 7/8" X 5".
A much smaller potentiometer has recently bec.nmppvni 1 1 v the. TIAP ng
would result In some si7e reduction! however ILLEGIB
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it is believed that the size reduction achieved will not justilLLEGIB
the cost of redesign for a nine unit requirement.
Declassified in Part - Sanitized Copy Approved for Release 2012/09/13: CIA-RDP78-03535A000500040003-8
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Declassified in Part - Sanitized Copy Approved for Release 2012/09/13: CIA-RDP78-03535A000500040003-8
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Construction of nine units based On the present prototype.
NO CHANGE
NO CHAU=
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Declassified in Part - Sanitized Copy Approved for Release 2012/09/13: CIA-RDP78-03535A000500040003-8