FY 57 R&D PROGRAM - MINIATURE DATA RECORDER

Document Type: 
Collection: 
Document Number (FOIA) /ESDN (CREST): 
CIA-RDP78-03424A001400060001-1
Release Decision: 
RIPPUB
Original Classification: 
S
Document Page Count: 
3
Document Creation Date: 
December 27, 2016
Document Release Date: 
September 11, 2012
Sequence Number: 
1
Case Number: 
Publication Date: 
August 21, 1956
Content Type: 
LETTER
File: 
AttachmentSize
PDF icon CIA-RDP78-03424A001400060001-1.pdf287.24 KB
Body: 
Declassified in Part-Sanitized Copy Approved for Release 2012/09R1 : CIA-RDP78-03424A001400060001-1 WAIL I - -ering Division ViSiOn OC SP A-6L 4. The attacbezent describes the mneral.. operating cheracteris- or t b e desired recorder midshou11 serve as a general guide on to base corttractorts discussions or negotiations. ORIG: OC-SP/EA FILE: OC-SP---- OC-E SPM Chrono 25X1 (21 Aug 56) 25X1 OLA:3 FARit:"3 ROI LILASS COMP 73 OP! 4 TYPE or [IV/ GM 2 1 AST tntXT nEv hUTH: HA 10.4 SE1ET bCO!flrflm"g Declassified in Part - Sanitized Copy Approved for Release 2012/09/11: CIA-RDP78-03424A001400060001-1 Declassified in Part - Sanitized Copy Approved for Release 2012/09/11: CIA-RDP78-03424A001400060001-1 CONFIDE\I fiAL Asa pertinent to the - proposed, thereto- Recorder ?Aril U LAT3.* /- heracteriaties are considered to be of the miniature reeorder for Ilection. It j 25X1 recorder be configured along the followinglines: 1. This unit 5hs1t be considered only as a recorder. playback will not be required by the same unit. however, that the unit have a provision whereby monitor recording is possible. an or 2. Three record channels with track widths of .-044and .1 center spacing on 1/4 inch tape. Track 1 and 2 will be c as data tracks; track 3 will be considered as a reference supplementary information track. Tracks 1 and 2 should have a frequency response of not lese than 10 ke at the 3 db point. Track 3 may, if necessary, have a lesser response. 3. The record speed should. be 1 7/8 inches per second. It is recommended that the Clevite head be considered so that use of this standard speed will result in the required frequency response. The minimum acceptable recording time is 45 minutes. It is recommended that the use of nylon supply and take up spools be investigated for use with thin base 'Wier tape. It is felt that the use of nylon spools will lessen the temperature problem common to this material. Further it is desired that the supply and. take up spools be the same size 4. The recorder should be completely battery o the interest of battery life, transistors should be espioyed wherever possible; It is desired that a mingle battery source b for ell electronics and that a separate battery be emplayed for the motor requirement. A minim= of 20 hours life is required. ifthe motor battery, and 100 hours minimum battery life of the electronics. The battery holders employed in this unit must be suitable for both mercury and common "paste" batteries. This is necessary to circum- vent the unsatisfactory law temperature performance of mercury batte A minimum electronics should be employed with data tracks 1 and 2 as t is intended that the unit be supplied sufficient audio fra2 companion receiver to drive the head. After a determination of head characteristics, the details of the amount of drive can be resolved. Declassified in Part- Sanitized Copy Approved forRelease2012/09/11 : CIA-RDP78-03424A001400060001-1 rONFIT) T1AL to, Declassified in Part - Sanitized Copy Approved for Release 2012/09/11: CIA-RDP78-03424A001400060001-1 .6 477 _ 6. Associated with Track 3 OW be an internal 1000 cycle reference oscillator. This oscillator in turn would be controlled from a push button from the front panel of the recorder. Also associated with this channel should be a permenently mounted internal micro- phone as well as a fitting for an external microphone. The external microphone jack and oscillator injection switch should disable the internal microphone circuit when they are in use. The oscillator stability should be better than 1/50,000. A provision should be made for the electrical remoting of all controls invalted with the recorder such as: (a) ON-OPF, (b) RECORD, (c) OSCILLATOR INJECTION. 8. As the recorder is intended for use ,audio,noise should be kept to an absolute minimum. 9. The recorder should be housed in a case of zinc alloy adequately protected against moisture, humidity, and fungus damage. 10. The attached sketch will serve as a guide to demonstrate the type of form factor and placement of controls, etc. A second type of miniaturerrecorder is required which would possess all of the general characteristics outlined above. The difference in the second unit is its feature of being able to playback during a rewind and erase cycle. This would necessitate a recorder unit With erase before record features and erase after playback. The second recorder is intended to be the basis on which a series of unattended installations capable of remote interrogation would be devised. During the playback cycle (rewind) it would be desirable to have the rewind speed be considerably in excesa of the original record speed being a factor of some 10:1. SN1 T CONF. I DF NI-U.\ L. 25X1 Declassified in Part - Sanitized Copy Approved for Release 2012/09/11: CIA-RDP78-03424A001400060001-1