TEST REPORT MILITARY RECORDER MODEL MR-1 26 AUGUST 1959

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03424A002000060019-5
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 5
• Document Creation Date: December 22, 2016
• Document Release Date: September 19, 2011
• Sequence Number: 19
• Publication Date: August 26, 1959
• Content Type: REPORT

Sanitized Copy Approved for Release 2011/09/19: CIA-RDP78-03424AO02000060019-5
CONFIDENTIAL
MILITARY RECORDER
Model MR-1
26 August 1959 WANUAW"
1. Crosstalk
Specification: Minimum of 40 db
Test: Due to the noise level of the system, evaluation
of the crosstalk figure was not obtainable on
playback . Record amp crosstalk = more than
-70 db.
2. Frequency Response
Specification: ?6 db 250 -to 60 Kc
Test: CIi 1 1000 - 0 Low -5
High +1
CH 2 1000 ' = 0 Low -4
High +1.5
CH 3 1000 ^- = 0 Low -4.5
High +1.3
3. Bias Frequency
Specification: 250 Kc
Test: 253 Kc
4. Wow & Flutter
Specification: .5% Peak to Peak
Test:
5. Power Drain
.5% Peak to Peak
Specification: 5 amps Run
WNFIDEN
TIAL
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 Sanitized Copy Approved for Release 2011/09/19: CIA-RDP78-03424A002000060019-5
CONFIDENI IAL
5. Power Drain (contd.)
6. Signal to Noise
Specification:
Test:
Rewind 9 amps
Amplifiers . 8 amps
Start
Forward Play 5 amps
Forward Record
5.3 amps
Unit Stopped
Noise CH 1 .25 volts peak to peak
CH 2 . 13 volts peak to peak
CH3 .5 volts peak to peak
Noise
rms CH 1 -42 db
CH 2 -43 db
CH 3 -37 db
Unit Running
Noise
rms
IDENTIRL
CH 1 -34 db
CH 2 -37 db
CH 3 -34 db
Sanitized Copy Approved for Release 2011/09/19: CIA-RDP78-03424A002000060019-5
 Sanitized Copy Approved for Release 2011/09/19: CIA-RDP78-03424AO02000060019-5
vy~_vLev i ~~~
GOttFIDENTIAL
Sanitized Copy Approved for Release 2011/09/19: CIA-RDP78-03424AO02000060019-5
 Sanitized Copy Approved for Release 2011/09/19: CIA-RDP78-03424AO02000060019-5
TEST REPORT
ENVIRONMENTAL CONDITIONS
Model MR-1.
25X1
1 i"EA'T TESTS
1, 1 Test on Circuit Cards Only
60 cycle frequency sub-system. AO-49 (3600 cps oscillator) connected to FD-]
(frequency divider) for 60 cps output.
Temperature Gain Remarks
70? F 0 db Ambient reference setting
120? F - 1 db Rising temperature - heat chamber
140? F -1, 5 db Rising temperature - heat chamber
150? F -2 db Rising temperature - heat chamber
150? F -3 db Stabilized temperature 15 mins, - heat chamber
1.2 Test on Entire Unit
Removed from case to allow faster stabilization at temperatures.
Temperature Operation Remarks
120 0 F Normal Drive motor comes to sync in normal time
125 0 F Normal Drive motor comes to sync in normal time
125? F Normal Runs sync speed through 1800 ft, reel of tape
125? F Normal Stabilized 15 mins.: then repeated 1800 ft. run
Entire unit in case (to prevent frost condensation on components),
Starter
Drive Motor
Temperature
Motor
Solenoids
Runs
Inc
Remarks
-40? F
OK
OK
No
No
-20? F
OK
OK
No
No
-0? F
OK
OK
No
No
+20? F
OK
OK
No
No
+300 F
OK
OK
No
No
+32? F
OK
OK
Yes
No W
ould not quite pull in
+40? F
OK
OK
Yes
Yes N
ormal operation
CONFIDENTIAL
Sanitized Copy Approved for Release 2011/09/19: CIA-RDP78-03424AO02000060019-5
 I Sanitized Copy Approved for Release 2011/09/19: CIA-RDP78-03424AO02000060019-5
Co
3 ROOM AM t31[E,NT 'rl-:sTs
3. 1 FrequencN Response
Within specification,
3,2 OutLut Level
Within specification:
3.3 Record Level
Within specification,
3.4 50 h cps Record
Formal,
3.5 (erational Check
Normal operation.
CONFIDEN IIAC
25X1
Sanitized Copy Approved for Release 2011/09/19: CIA-RDP78-03424AO02000060019-5