RS-101 POWER AND AUDIO ACCESSORY REQUIREMENTS

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP79-01578A000100110010-7
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 6
• Document Creation Date: November 17, 2016
• Document Release Date: June 23, 2000
• Sequence Number: 10
• Publication Date: July 6, 1967
• Content Type: MEMO

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Memorandum
Chairman, Equipment Board., OC
FROM : Chief, Operations Support Staff, OC
oss M67-618
DATE: 6 July 1967
SUBJECT: RS-101 Power and Audio Accessory Requirements
On 7 April, the Operations Support and Engineering Staffs were
directed by the Equipment Board to select and procure various accessories
for use with the,RS-101. The Operations Support Staff has already
outlined requirements for several accessories that will be peculiar
to the RS-101 radio set. Power and audio accessories, however, will
be useful for a variety of radio sets either planned or in existence.
Because the cost of these accessories is high and because these require-
ments relate to other programs, the requirement letters are presented
for Equipment Board consideration at this time. Copies of the require-
ment letters which we propose forwarding to the Engineering Staff are
attached.
25X1A
Attachments:
l - Requirement Letter (oss m67-550
1 - Requirement Letter OSS M67-619
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Memorandum
Chief, Engineering Staff, OC
oss-167-550
DATE: 20 June 1967
FROM : Chief, Operations Support Staff, OC
SUBJECT: RS-101 Power Accessory Requirements
1. A number of accessories are needed to power the RS-101 radio
set. Generally, RS-101 applications will fall into two basic categories
for which different power sources are indicated. The categories are
manual. CW or voice and automatic morse'operation. Each category may be
further broken down into manpack and semi-stationary or mobile applications.
The capacity of the RS-101 internal nickel cadmium battery limits its
usefulness to power only the receiver during manual and voice service
and additionally powering the transmitter and keyer during the short trans-
.missions with automatic service. It is apparent then that a higher capacity
power source is needed to power the transmitter in manual morse and voice
service and that battery chargers are needed for the internal battery.
Additionally, a DC/DC converter is needed so the radio can be used on
21--28 volt vehicles, and an expendable battery supply, similar to the
mercury battery used in the DELCO 5300,'is desired to increase system
utility. Finally, the RP-101 which you are developing, should complete
the power accessory complement for the initial buy of RS-101 equipment.
2. Since the RS-101 is primarily a tactical radio set, a hand
generator appears to be the obvious-power source for manual CW or voice
manpack operations. Our choice considers relative sizes, weights, en-
durance, and resupply factors of fuel cell chargers with batteries, hand
generator chargers with batteries, and the on-line hand generator. Please
proceed then with development of a durable, 12-volt,"65-watt hand generator
for on-line operation of the RS-101. This generator can also be used for
future equipments requiring an on-line hand generator power source. The
complete hand generator should not exceed the volume of the basic RS-101
and, if possible, should not weigh over 12 pounds. You may wish to
utilize the HG-100 with appropriate size reduction or-to increase capacity
of the HG-119P. In either case we prefer a ruggedized version of the
mounting assembly developed at the R&D Laboratory as used on the HG-49P.
A rugged interconnecting cable assembly is needed to couple the generator
output to the radio set. The cable should preferably have parallel con-
ductors to provide redundant circuit paths.
3. We would like several chargers for the internal rechargeable
battery. Since existing units nearly meet'the requirement you may wish to
alter them rather than start new development projects.
a. A hand generator charger is appropriate for manpack medium
speed applications. The HG/A-48 may be altered to serve this
purpose. The electrical modifications' app~)ear'minor - however
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a much more durable cable is desired. The generator case
corners should have more radius to reduce pack wear and
the modified unit should be painted to match the RS-101.
b. Moving units can use a small AC charger to carry and use
when they are located at places where power is available.
Semi-stationary units may also use a small AC charger where
power is only available part time. We feel that the EMBC-112
is a convenient size and request that it be made compatible
with the RS-101 battery. Here again, the case corners should
be rounded and the connectors should be more rugged. A
moderate size increase can be tolerated to accommodate the
improvements. The operating charger should not affect
operation of a nearby RS-101 receiver employing a separate
battery and changes are needed to safeguard the user from
the electrical shock hazard existing in the EMBC-112.
1.. After experience with the DELCO 5300 and its two different battery
supplies we feel that an expendable mercury battery pack is in order for the
RS-101. Please arrange for development of a mercury pack that will fit
in the RS-101 battery compartment. The connections on this pack should be
made so that charging voltage will not appear across the mercury battery.
The packs should be delivered in seale and the date of manu-
facture should be clearly visible through the bag. -Each bag should also
contain two adhesive labels which can be marked with the date of installation
and be affixed to the battery and equipment case.
5. Development of the RP-101 should be actively pursued so that
production units are available coincident with availability of the RS-101.
6. Vehicular applications will undoubtably include operation in U.S.
military vehicles having a 24-28 volt DC power supply. In such 'cases we
will need a converter to allow operation of our 12 volt radio system and its
accessories. It would be convenient to have'the converter capable of'bulk-
head or platform mounting or attachment to the equipment vehicular mount.
The usual mounting hardware and cabling should be supplied with the con-
verter. Converter development may follow development of the other power
accessories if necessary.
7. For your planning purposes we have estimated the power accessory
ratios given below.
34+ On-line hand generators for every 50 RS-101's
16 Battery charge hand generators for every 50 RS-101's
28 AC battery chargers for every 50 RS-101's
2 Nickel Cadmium batteries for every RS-101
34 DC/DC converters for every 50 RS-101's
14 RP-101's for every 50 RS-101's
Expendable battery production must be related to consumption rates.
8. Looking beyond accessory requirements' for initial production
model RS-101 equipment we hope for eventual development of an integrated
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battery supply.
9. Questions concerning operational features or application of these
accessories should be directed to Tom Shedd at extension 5596. We are
prepared to join actively in the development of these accessories.
25X1A
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Memorandum
Chief, Engineering Staff, OC
Chief, Operations Support Staff, OC
oss M67-619
DATE: 6 July 1967
1. A variety of audio accessories are desired for use with the RS-101
radio set. This variety results from the different applications which we
envision for the RS-101. Generally, RS-101 applications will fall into
the two basic categories of manpack and semi-stationary or'mobile service.
For manpack service a headset is always needed and in some cases a hand-
set may also be used. For semi-stationary applications a headset or loud-
speaker is needed and in some cases a hand microphone or handset will also
be used. For vehicular or maritime applications a headset or loudspeaker
is needed and in some cases a boom microphone, hand microphone, or hand-
set may be used. The overall requirement is for, a headset, a boom micro-
phone for use with the headset, a handset, a hand microphone, and a loud-
speaker.
2. Accessories used with the RS-101 must be durable and the rugged,
blastproof, and waterproof military standard accessories fit the require-
ment. Unfortunately, many of the military accessories are large and
heavy which makes them unattractive for manpack service. Smaller and
lighter accessories are being developed and we have examined prototypes,,,
which appear satisfactory. Since the new units are not yet in volume
production, the price differential between the current standard units
and the new units may be significant and we may have to tolerate the
size and weight disadvantage of the older accessories. With this factor
in mind, we request that the following military units be considered for
procurement:
a. Headset H-251/U or Headset H-11+0-A/U
b. Standard USAF noise cancelling boom microphone
for use with headset selected above
c. Hand microphone M-125 or microphone M-81
d. Handset H-250/U or Handset H-189
3. There is no standard military loudspeaker which carries the
features we would like in our loudspeaker. (A suitable military unit
was developed for use with the AN/PRC-62 but the basic radio never went
to production). The desired loudspeaker should consist of a small box
containing the transducer, an OFF/ON switch for the transducer, and a
U-183 receptacle for standard accessories. A rugged interconnecting
cable should be supplied which connects the loudspeaker unit to the
basic equipment. The loudspeaker box should be made to attach on the
universal mounting kit previously requested and also be provided with
a clamp for attachment to objects up to two inches thick.
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4. For your planning purposes, we estimate the audio accessory
ratios given below:
70 headsets for every 50 RS-101's
20 hand microphones for every 50 RS-101's
4+0 handsets for every 50 RS-101's
20 boom microphones for every 50 RS-101's
25 loudspeakers for every 50 RS-101's
Questions concerning operational features or application of these
accessories may be directed to Tom Shedd at extension 5596.'
25X1A
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