REPLY TO REPORTS ON SYSTEM 3 DATED 22 AUGUST 1957, 29 AUGUST 1957, AND 5 SEPTEMBER 1957.

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP81B00878R000200050055-0
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 1
• Document Creation Date: December 9, 2016
• Document Release Date: February 16, 2000
• Sequence Number: 55
• Publication Date: October 21, 1957
• Content Type: MEMO

CMCC Doe. No. 151X5.781
r ',y 9 of 3
DP81 BO4878fi 1Ob200050055-0
WRSP(3) 21 October 1957
Headquarters ..
Subject:, Reply to Reports on System 3 dated 22 August 1957,
29 August 1957, and 5 September 1957.
P
Thank you for the information supplied in report dated 5 September 1957.
With regard to item 2 of the same report, a filter of 1000 t 50 cps is used
in the analyzing equipment to extract the time note. This filter has a sharp
fall-off on each edge of the pasaband giving an adequate 0 for the intended
purpose.
Concerning report dated 29 August 1957, parties responsible and/or
interested have been informed of your various items.
The temperatures mentioned in item 5 agree nominally with those observed
here.
In answer to report dated Z2 August 1957, your conclusion in item 3 is
probably correct. You will find that the audio is low in amplitude and is
difficult to hear with headphones above the ambient noise of the aircraft.
However, if you disconnect the low impedance recorder, you should be able to
hear the modulation if you are locked on to a station. If you lock on to CW
signals, you naturally get no modulation.
In item 4, your oscillator is very good to find if you can lock on, but this
doesn't ascertain that the receiver is locking on at the right frequency. Use
the SLOE grid dip meter 4Boonton} which has an oscillator in it with fair
frequency stability, and this can be read to some degree of accuracy.
In item 5, Production has found this to be a rather common occurrence.
Reference item 8. We can no longer ship parts direct to you. You have
three ways of obtaining parts not available in the FAX:
1 . Have base supply get them for you.
Z. Have Supply request that the depot buy them from us on a purchase
request.
3. Have the depot request a change in the FAK provision contract to
supply more or additional parts not now included on the list.
The other items of the report are noted, and the interested parties have
been informed. 25X1 A
SR W:hep
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B00878 R000200050055-0