SPECIAL OSCILLOSCOPIC DEVICE

• Document Type: SPECIALCOLLECTION
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): 00184358
• Release Decision: RIPPUB
• Original Classification: U
• Document Page Count: 1
• Document Creation Date: January 21, 2025
• Document Release Date: January 15, 1983
• Publication Date: May 23, 1951

411110
TO
VIA
FROM
SUBJECT
SPECIAL OSCILLOSCOPIC DEVICE
23 May 1951
Reference is made to your informal memorandum of 14 May 1951, and
attached documents concerning a new type of oscilloscopic device with
extremely high fidelity tape recorder*
41111/MOMPlan
d the writer feel that such a device may be of con�
siderable interest both to general I & SO work and to special Bluebird
interests. It is also felt that it may be of value to agency field units*
It is therefore requested that arrangements be made as soon as
possible foreilliel4 and the writer to examine and test this machine
lccally if one'is available or if not obtain from. he a ufacturer completeA
operational and technical details for our study, is of the iT
opinion that this equipment will be quite bulky and very expensive and
thorough investigation should be made before committing ourselves to purchase.
For your consideration and based upon the meager information
furnished us concerning the oscilloscopic device, we have set out below
several possible (and valuable) uses to w,ich the device could be employed
if found to be practical and operationally sound:
la It could be used for very high level identification*
2. It could be possibly used for testing identification under S.I.
3. It possibly could be used on a large scale as a security check
using given code words or phrases.
140 Bluebird is always interested in very high fidelity tape or
other type recorders.
5. It may possibly be of extreme value in determining key sounds
or key words made by human voice in S.I. techniques.