Inspection Report No. 4(Classified)

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-02820A001200060009-3
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 3
• Document Creation Date: December 9, 2016
• Document Release Date: May 15, 2001
• Sequence Number: 9
• Publication Date: November 2, 1966
• Content Type: MF

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001200060009-3
MAY 1082 EDITION =iir Ew r.. 1 L I
GSA GEN. REG. NO. 27 -ampf
Memorandum
25X1A9a
FROM Mr.
SUBJECT: Irnspection Report No. 4 - DF-4
MEW
1, Project Description:
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2.
Contractual Information:
25X1A1a
a.
b.
Initial Cost:
Request for Procurement Action: 16 Novembe
r 1965
c.
d.
Initiation Date: 10 January 1966
Completion Date: November 1966 Extension:
December 1966
e.
Deliverable Items: Two prototype DF-4's; engineering-drawings;
final report
3.
4.
Date of Meeting: 18 - 19 October 1966
Place of Meeting:
coin automatic
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4~~~ dQC1~5~1iIC
Approved Fa04eWa~DSninp7l c/,~ 8-00`28 0 'aUo -flan
EP 66-231
DATE: 2 November 1966
 .. Approved For Release 2001/07/28 : CI
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EP 66-231
SUBJECT: Inspection Report No,-4 - DF-4 25X1A5a1
Persons Attending:
Agency Non-Agency
6. Contractor's Performance:
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820A001200060009-3
Mr.
Mr.
a. On schedule and expected to remain so: No
b. Within obligated funds and expected to remain so: No
c, Satisfactory technical progress: Yes
25X1A5a1
Project Status:
Two DF-4's were available for field, tests. The units performed.
acceptably when used against AM Broadcast stations but did not operate
in a useable manner against CW type signals. This was,caused by the'use.
of AGC circuits involving attack/d.ecay times not designed to handle the
CW transmission, The AGC in one unit was disabled and an outboard. manual
gain control installed. Results were encouraging except that now the
ratio meter operated erratically and was not able to "follow the signal."
was requested to investigate and. evaluate a manual gain vs
AGC. The AGC is obviously the most desirable but a compromise com-
bination of manual gain and AGC or a lone, manual, gain control may
have to be effected.
Several operational/function requirements of the DF-4 were changed.
Among these were:
1. Replace the miniature earphone jack on the equipment with
one designed to accept a PL-55.
2. Replace the European wall plug on the battery charger line
cord with an American style plug.
3. Change the screw thread. on the cap cover of the'battery
compartment and the battery charger line cord compartment to one
having a coarser thread, to facilitate more rapid replacement.
SECRET
Approved For Release 2001/07/28 : CIA-ROP78-02820A001200060009-3
 Approved For Release 2001/07/28 : C 02820A001200060009-3
Aaw VIRET
SUBJECT: Inspection Report No, 4 - DF-4
25X1A5a1
4. Provide guide pins to properly align the ferrite antenna
section built into the case bottom when replacing it to the case
proper.
5. Use regular Nicad, batteries instead of passive adhydrode
Nicads to power the DF-4's and thus provide a 14 to 16 hour
charge cycle. In addition, eliminate the requirement to operate
the DF-4 from Mercury batteries.
6. Improve the crystal calibrator circuits to provide an
obvious calibration point.
7. Provide a fiber glass carrying case containing a canvas
strap (for shoulder transport), earphones, sense antenna, extra
Nicad battery and, Allen wrenches.
8. The waterproof requirement is relaxed to the lesser
requirement of rainproof.
9. Provide a complete, final form, technical manual including
photos, parts lists, etc., rather than just furnishing a brief
operational guide type book.
Because of'the AGO problem, about 4 to 6 weeks of additional work
will be involved. Funding under the contract is now under close review
and a small overrun is virtually certain. Another field test will be
scheduled near the conclusion of the program to evaluate the above
changes and the operational capabilities of the DF-4.
Distribution:
R&D Subject File
OL/PD/PCB/CAS
R&D Lab
0C-0S
OC-SPS
ESB
Monthly (3)
EP Chrono
0C-E/R&D-EP: pjs/3152(2 Nov 66)
SECRET
EP 66-231
25X1A9a.
-?-d Approved For Release 2001/07/28 : CIA-3RDP78-0282OA001200060009-3