KE-6 KEYER

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03424A001200020004-4
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 3
• Document Creation Date: December 22, 2016
• Document Release Date: February 16, 2012
• Sequence Number: 4
• Publication Date: February 3, 1959
• Content Type: MEMO

Declassified in Part - Sanitized Copy Approved for Release 2012/02/16: C_ IA-RDP78-03424AO01200020004-4
SrAPIDARD FORM NO. 84 to N r U J L N 11 A L
office Memorandum UNITED STATES GOVERNMENT
TO Chief, R&D Branch DATE: 3 February 1959
FROM : Chief, R&D Laboratory
suBJECr: KE-6 Keyer
1. Here is additional information regarding the (electrical
and mechanical characteristics of the KE-6 Keyer.
- - - - - - 1-,.- I . ~
2. The keyer, after rework by the manufacturer, was returned
to the R&D Laboratory for electrical and mechanical tests. The
test results are outlined in A&A Report No. 182-C (Part III).
Attachment:
A&A Report No. 182-C (Part III)
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ORIGINAL CL BY
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EXT BYND 6 YRS
REASON
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Declassified in Part - Sanitized Copy Approved for Release 2012/02/16: CIA-RDP78-03424AO01200020004-4
 Declassified in Part - Sanitized Copy Approved for Release 2012/02/16: CIA-RDP78-03424AO01200020004-4
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- 71
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A&A Report No. 182-C (Part III) Project No. 2004-144
3 February 1959
KE-6 KEYER ELECTRICAL AND MECHANICAL TEST RESULTS
ANALYSIS AND APPRAISAL
One KE-6 Keyer was delivered to the R&D Laboratory for tests. Pre-
vious to this date the keyer had been returned to the manufacturer
for rework to eliminate several undesirable electrical and mechanical
features.
2. ELECTRICAL TEST
The KE-6 Keyer performed during the electrical test as follows:
(a) The motor speed is approximately 650 rpm.
(b) The voltage measured across the motor input terminals is 5.3
volts, DC.
(c) The keyer transmits the correct international Morse Code
character-when the appropriate keyer button is fully de-
pressed. The keyer transmits incorrect characters when the
keyer button is not fully depressed.
The improvements noted in A&A Report No. 182-C (Part II) regarding
the mechanical characteristics of earlier models of the KE-6 Keyer
are applicable to the present model. These improvements include
good workmanship, workable latch on the case, reduction in gear
train rollout, and the use of nylon material to form the keyer
buttons.
The recommendations, contained in the referenced report, to improve
the keyer have, in part, been incorporated into the present model
as follows:
(a) A cable clamp has been installed in the keyer to secure the
keyer cable.
(b) The collector ring contact tip has been silver plated. The
referenced report recommended that the entire contact be
silver plated to insure that good electrical contact is main-
tained with the etched circuit board.
CONFMEN ~ SQL
Declassified in Part - Sanitized Copy Approved for Release 2012/02/16: CIA-RDP78-03424AO01200020004-4
 Declassified in Part - Sanitized Copy Approved for Release 2012/02/16: CIA-RDP78-03424AO01200020004e 2
(c) The manufacturer has attempted to comply with the recommenda-
tion vhich states that the individual segment pin contacts
beneath each key button should be made the same height. The
common contact for each key should be made approximately 1/64
inch lower than the individual segment pin contact. The
mechanical inspection of the present model revealed that
several segment pin contacts are lower in height than are
the common contacts. Therefore, it is still possible to
transmit incorrectly when the keyer button is depressed.
4. CONCLUSIONS AND RECOMMENDATIONS
The KE-6 Keyer failed to operate satisfactorily during the elec-
trical test. It is requested that the following recommendations be
incorporated in future models.
(a) The segment pin contacts should be raised approximately 1/64
inch above the height of the common key contacts. This will
insure that the correct character is transmitted when the key
is depressed. This may be accomplished by increasing, slightly,
the spring tension on the segment pin contacts and forcing the
contacts to protrude farther out of the retaining holes.
(b) The motor speed should be increased to approximately 900 - 1000
rpm maximum. The speed may be increased by reducing the load
on the motor. This may be accomplished by an adjustment of the
spring tension of the collector ring contact. The collector
ring contact tip should be pressured against the brush housing
contact hub with the least possible friction and should, at the
same time, insure continuity is maintained. The gear train
should, also, be examined to insure that it rotates with the
least amount of friction.
CON,
Declassified in Part - Sanitized Copy Approved for Release 2012/02/16: CIA-RDP78-03424AO01200020004-4