AUDIO OSCILLATORS, IN-1 AND IN 9

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03535A000600080002-4
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 1
• Document Creation Date: December 22, 2016
• Document Release Date: April 11, 2012
• Sequence Number: 2
• Publication Date: November 12, 1958
• Content Type: MISC

Declassified in Part - Sanitized Copy Approved for Release 2012/04/11: CIA-RDP78-03535A000600080002-4
', Spc(:iai P came . to f , CC
Audio t iUatora3, IN -1 and, Ili 9
Chief, En4igeerinn :Staff,
mew w, 8,491 dated -3) Apra
mmo, sw 8 -765 dated M- August 195:-"
L2 November
1. A review of R&D laboratory fabrication cc tents indi-
cates that we have not as yet. received an operational evaluation
resort on the I N-4 oscillator. To facilitate our aachedul iz ;please
review your requirement for t..is oscillator in terms of End, 4 49,1,
and advise as to the suitability of the prototype submitted and,
if found acceptable, the quantity desired.
e . With reference to the trature - ve i'rucuency stability
characteristic of the 13- oscillator ( 6 -7 7), previous t erat
tuts tests and design experience with this circuit and the unijunction
transistor i icnte that t In about as good as can be expected, on
frequency stability. Ait ou h detailed to rerature data has not been
run for the unit over t reduced range of 42000 to 4i?C, previous
tests over tT>ar> p 44cr rye from -4., ?c to -r-55 did not, show a
ficant stabilitj iW t In the restricted range. In addition,
the tolerance spry or current production ur wxction traasis?tors
is fy r too great to support fir z stability pr ctions on the basis
of wall sample testing. The unijun.cttcs transistors now used are
not straight: production run Itms but rather are purchseed with
specified tolerances an certain par to rs . Even so, the long tam
stability of units so purchasel cast: doubt on the advisability, of
seeking, further stability improvement through transistor selection.
It therefore appears that the stability econanlcal feasible in
the present IN -9 circuit configuration is + `. On the `bads of
this inforaation, please advise as to the suitability of the unit
ash,, if suitable, the no r of units required.
ofsac ca
ORIG MISS
JUST
~c ,/L -b'b -~G 6XG 32 11~
20 TO
R&D/Lab/NCP/jcm (12 November 1958)
Original and 1
- Addressee
1
- Lab Subject
1
- OC-E Chrono
1
- R&D Chrono
1
- Dev/s
Declassified in Part - Sanitized Copy Approved for Release 2012/04/11: CIA-RDP78-03535A000600080002-4