CONTRACT NO. RD85

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03424A002400050011-0
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 26
• Document Creation Date: December 22, 2016
• Document Release Date: September 20, 2011
• Sequence Number: 11
• Publication Date: January 25, 1957
• Content Type: MISC

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Ulu~
Progress Rep
nuary 2
195725X1
Contract No. RO'
a k
1. Phase 1 co
20 Phases 2 and 3 cancelled.
1. AC Power Supply RP-11 for radio stations'RS-ll series.
The power transformers described in the previous Progress
Report were submitted to 15 companies,two of whom expressed
a desire to construct this item. One sample was received
from each of these companies; neither met the requirements
specified Ind therefore are onus able. On the basis of this,
a re-evaluation of the Power Supply requirements has been
made and a new design of this unit has been completed. A
proposed schematic is shown as the attached drawing 2SK-558,
The major effect of this redesign was to change the
rectifier circuit from bridge to full wave and to eliminate
some of the filter circuits in favor of dropping resistors.
The design of the Power Transformer is based on a duty-cycle
of 15 minutes transmission and 30 minutes reception.7Input
taps ranging from 70 to 270 volts,50 to 400 cycles, will be
provided. These will bo brought rut to separate pin plugs,
so that the line cord may be inserted into the proper taps
as indicated by a neon bulb in the secondary circuit. The
components of the AC Power Supply will fit into the carrying
case 3n" the space provided for the spare battery. Connectors
for the receiver and transmitter will be provided on the side
of the case as described in the equipment proposal.
CON
AL
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The hous_.ig for this utntt--h'as- to-en- completed and all other
parts are on order.
'2. Hand Crank Generator Power Supply for Radio Station Rs-11 Series.
No further work on this portion of the task has been
accomplished since the previous Progress Report, pending
a reply to our request for authority to sub-contract
development of the generator unit.
A prototype RS-11-C transmitter/receiver'station has been
built and the design is 95% finalized. All purchase parts
to complete Task 3 are on order and 85% has been received.
Parts to be fabricated in the plant are 55% completed. Froth
the transmitter and the receiver prototypes are'now under-
going specification tests. These are expected to be completed
within four weeks for submission to the contracting agency.
A new type of ink especially adapted to Polyester materials
has been received and is being evaluated on the Mylar Dial
Tape in the RR-11-C Receiver. Further investigation on
the subject of suitable marking inks is being pursued.
C~G.~.i~ sf
141
.Y
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 JOSEPH HERRITT D CO.. HARTFORD. CORM. NO. 105L
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T101/ 7-1- - ro
070
230 c
.go '?
/5Q H J1 q
5O- O0 rv F,,~"I
Z
/25 Voc
/5 MA
'~ _ ~. 5 !/C ! A MF'
/25 VLc ~O0 /1A
Sc E/ - Toc
PQ ,? Ue? P
FIRST USED oN /0/
TOLERANCES UNLESS MARKED
FRAC. f .010 DEC. * .003
ANG. * W
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REQ'D . REF. ASS'Y
2-?m
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Progre port
RD85 A 2
AC Pover supply
.The components for the filter
section or the A,C. povder supply have been designed
and received from vendors. Calculations showing
inductance and capaoitant a values 'and physioal
size follow on succeeding pages 'of this report.
The power trans Pores r has also
been designed and requests sent out to vendors.
'Ve are expecting one transform .er from one vendor
for test purposes in about a ueek. 'A breadboQrd
sot-up has beenn,made to aorb eliate calculated A.C.
volt ages to Get required D.G. voltages out.
Sue have also received the silicon
roctiflare that tai l1 be, required for the project.
Drafting layouts for the poW=r supply
case will Start upon receipt' of pottier transform r,
The following pees include the
design oeiaaila ti one and schemado diagrams of the
A.C. polle.r supply,
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AC PO 1 SUPPLY FILTER SECTIONS
ILput; 70, 95, 120, 150, 190, 230, 2701
50- 4000 8.
?utput of pow or supply;
225v 0 100 ma
125v 15
2.5v 1 amp.
1.25 400 a
0 225V 0 100
2 ri pplo
0 125V 0 15ma
A% ripple
Ground
QQ 20D
p ea h ere . i 2000
fsp .50 ops
Lo
1
c x6 $ 2.4 by
for single phase full nave; ripple .02
? ( 0)2= .02 1.2 LCc 6o
C-- 60 22tJ1 Let; L=4 h y then, 06 15Uf
z 8 25 = -1'9 , .01 LC;: 120
C= 1, -. 12Ufd
O -f 16Q 400
2,v ripplo
B1iatnate
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2.
"n% 0 75 hy
1 .03 L= 40
C 0 lOa700 Uf'd.
0
0375
Inoreiso L to appponimatelyT ,a2 hy;
G" 2000 u. .
. 2 T R
,i= .0037 .
2 ..02 LO 60
C: 60 m 16, 000 'pfd.
M37
lackease L to --.013- hY
Om 60 ' 2000 Ufd.
.
Q 0,K B SIGNIS
+ 225VSqg ion
4 hy min, 10VAC, 125mra, 100V ripple.
Oogo BI-21, Audio A. 29 Ge 5/8" st ok
.5 x ,625 z 6.45 2.02 cm2
lge Se26
Tr Y 3350T of #348J.
ftbbin m 25/32 VI.L.= 23/32 T/L. 134 x 23/32 m-96
9
1.03 [ 5 (?007) + .025] Z 6278 $.F,:: 90%
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370 GaUso
1.256 z 3350 x .1 - 420
Z ta P-,Po 51 no m 6 Uao = 350
tai ' ke20o .03 em0 o .0118 in.
V o 1 Q .00286
Va x?0286 U.
..0065
x02 154 Z-110 T! 4.7 by
2(1/2 X 5/8) 6.28 (.02 -139),Q 1.25 1 = .188
12
.188 3350 6271
R 627 i .261 ? 164
Choko drop 175 x .1 - l7.5 V.
Approximate
Size
Li
Dole to
10 hr min$ 5 VaoO 100 cps, 15 madc
Cora- EE 24 25
A- , 406 cm
1m 5408 ca
Bobbin - 15/32 VA.= 13/32
Try 7250T of "q4l S.1',
T/L T. 2:86 x 13/32 = 116 7? JO . 63 L
1 '
.0065 Ua 1 154
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a 1.03 63 (.0031) +.025 "P .227 $ ?Je -..- 91%
R 108_ 7
4. x oo x 250 x 40 X
n 1.256 x 7250 x .015 - 136
16 =
27 Ho w 3.8
5,0
lair 1 6 .00974 cm.
So
Vao 1 .00185
Va 000185 + .0097-4 .0038
5.0
Ua 0-0 Z m 263
8
6x
5.08
. 425 Gauss
Uac =- 540
.00384 in,
263x10?8 _ 12.5hy
UT 2(t + ?;)+ 6.28 (.02 + .113) = Ham, H. 835 e .153
z
L .153 x 7250 = 11101 R - 1110 x 1.32? 1463 12
1610
Choke drop o 24V
Approximate
Size
L2
.02 by niinp 1 amp do, 100 cps a .1 Vac
Wire # 24 S.F. 320 turns
Core; DI - 375 ? Audio "A". 29 Ca . , 7/16 " Stack
Bobbin 1eneth 23/32k W.L. = 21/32
b/L 'Zz 42 Z 21/32 0 27 20, 12L
a - 1.03 112' (0213) + .02 9= - 0288 S.F. 92%
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A :
.375 n .437 x 6,45 Z 1.06
=2
1g?
7.3 0M ffi
x 100
30 a 1.06
mmf
1*256 x 320 Z 1 & 400
a 74 Gauss
.9
hpq = 55 lao w 6 Uac ? 300 Vao =___ -m- .00333
lair = 0000 a .0113 in.
14000
Va Z .00331 + .off, ,00725
138
L = 2 Q6 X .9 x 202 ffi 8 .023 by
?
PMT C 2(3/8 + 7/16) 6.28 (,02+.144) : 1JQ2 IL .22
12
L = .22 z 320 0 70.51
R 70.5 x a 02 56 ...,- 1.81 X2._
Choko drop % 1,81 V
1#21 Q &QQ M
.03 by mm, 400 made, 100 spas .03 V A Q
Wire size #273F 310T
Core 24.25, Audio "A"? 29 Gar A" Stack.
Bobbin 15/32 W. L. = 13/32
T/L = 60-x 13/32 = 24 13L
~
Approximate
Size
L2
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i
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1.03 C13 (.0152) + .0257 16 .23 S. F. c 92%
A- .25 x .5 x 6.45 u .805 cm2
1feu 5.08 cm
I~Mev :.08 X .0 30
4.44 x oo x 310 x .805 x .9
mmg= 1.256 x 310 x .4 p 156
156 'Q- 30.6 Ho = 4 Uao ? 350 Vac .00286
lair Q .011 cm = .00438 in.
0
VA w .00286 + 0111 .00504 Ua 1 199
5.o .0650
L 6 x 80x x 3102 x 1 x 10?8 Q 1.0343 by
,9~ m9 5 .d
6.28 (.02 + .115) .5 + .84
.195
1
.195 x 310 a 60.61
R = 60.6 x .05114 = 3.12 -XZ
Choke drop ? 1.25 V
Approximate
Size
L3
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TRANSFOMM CALCULATIONS
Put; 70?95-120.150-190-230-270
50-400 cps.
Output; ? 225VDC L 100 ma
125VDC @ 15 ma
2.5VDC L 1 amp.
1.25VD0 C? 100 ma
Assume; 3V? drop in
rootifiers.
17o5V drop
in ohoke.
Assumes 3V drop in
zeotifiers.
1.81V drop
in choke.
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PROJECTS 88 and 101
tC power supply scheatio diagram
2257 D C
O MM
21,3 ripple
12 D 0
0 15ma
412 ripple
1.2 @ 400 2 ripple
SiUeora R ti-'lero, Transivron Type 1 or Qg..
Silicon Rectifiers, ansk4ron Type 1 or egg
Lot_es: a. The 1.25 V section may require eapao1tor input for voltage step-up.
b, i ovision should be made for regulation 6f the 1.25 V receiver fllamnt volt
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SPACE t Vt1LDL FOR AC SUPPLY
to inolude;
1. Power Trans f orcer
2. 3- Chows L L2 ?L3
30 3-Capaoitors C1e C2n C3
&? 4-8ilioon reotif1ers Transitron Type TL-61.
5. /?Sil oon reotif'iers Transition Typo l?'1
6. 1-Subminiature regulator tube for 125V oootlono
5644)
7
Tapmseleoting switch.
8.
Ieon ind1oating lamp.
9.
1?Povier resistor 5K
5W.
1?0
1-Power eeaiator 6K
1t,,
All of the above components will fit into the space sho'~ n,
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Progress Port - Continued
RD85 - Task 2
Band Crank Generator
Similar oaloulations as were per-
formed on the A.C. power supply filter section
were also done on the hand crank generator filter
section. The resultant values are shown on
Gk10 ke
schematic 2-SK-515. These filtor capa-o s and
tantalytic capacitors have been received from
vendors.
A prepared layout of the alternator
appears on drav;ing 2?SKW5l80 It appears from
inquiries that have been sent out that the 1.265
inch length of the alternator (necessary for the
alternator to fit into the carrying case that has
been designed for the receivers and transmitters)
is quite difficult to meet. A question will be
raised at this point. Is It absolutely necessary
that the hand crank generator fit into the carrying
case? The vendors have also been informed that the
overall d iams ter of the alternator could go larger
but that still doesn't appear to help the length
situation. Eastern Air Devices in Dover, New $ampsh
has prepared an alternator with a diameter of 3-5/16
Inches by 3 inches in length.` Induction Motors Company
has also prepared approximately the same dimensions.
Your comments on this matter would be greatly
appreciated.
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 d,-,) Dory CYC&aS
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tro of Unit: ^ Open
T"4 Gon.
^ 3 Phase Ait,
-'-I Enck)oocl
^ A.C. yorh X90 ~.
^ Non-cooled
eSinc:lo Phrtno Alt.
LJ MuWtipye hequency (indicote Combination)
'lominal Output Volts/RPM & Allowable Toloranco
Low
Spood tango: Max. Min. Variation in Volts Out C.W.
Speed(s)
Froquoncy(a)
Voltago(s)
A - oraco(o)
Wa ttago(s)
o cYc
Phase Data
Power Factor of Load(s)-
Max. Harmonic Distortion Permittod a^~
lamp. Ambiont ('C.)
Special Noiso Requiroments:
Time On_'9R_$L3c_-_ ^ Continuous
Time
rotation: "Reversible ^ Clockwise
'fax. Dimensions (except shaft): Dia.
onnoctions: ^ Terminals Type
^ Self-cooled
^ 2 New Alt.
rLG~ y YC:?
0
-High
LengthTyke
Dia. Ext. _ _ lndicato flat, slot, otc., if applicable)
ngs: ^ Sleeve 1all
:.,brication: ^ Standard
,`e Expoetancy:
/
B'Spocial
CIas~Q?A 0
~ ~- Typo _7/
Output Linearity
(Sy i Typ?.)
P'a AT 'Y A-1-Er_: /___________
OF-
- ght: (Lbs. & Oz.) ,F &?Z A-199
Regulation: _ Nod - -_- _-_ _ % at __ load Voltage
SS at __ FA4I&_ load.
PPS
.Explication: ^ Commercial [Military ^ Applicable Specs,
'.oturo of Application:
`thor Roquiromonto:
1 4 u d_-
':oduction Quantity Roquirod
Approx. Prico tangos: Prototypes cs??
Data Rpquirod: 7 _ F194 M : ; y ?fs 12-o __
,se revorso Bide for color code, diagrams, and othor commonts.
:TE TO SALES: Indicato (on revorse oido if nocosoory) noaroot
7'T. 00
oxisting typo to cuotomor'o roquiromonta, with coirod
(Specify Type)
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Counterclockwise (Viewed from load end)
j Stuhnud Threaded Data: - -__-_--
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,61 E 288 V-fHVS
1-3
,4H
0'5.
a- --- - - - ~;
+225 V D C - IG~ ': A,
2% RIPPLE AT O MA
L. 2,5 UF
ix,
1.8H
L5 UF
2755
V
MA
1%
RIPPLE
AT 15 MA
:003 H
.4f
.0045 H
1.2 -ft
'200 U F
PM
FIELD
I'MAGN F T
7
4000 RPM
NOMINAL
12 POLE
CEO+ER YAP
L
+2.5 VDC - I AMP
3% RIPPLE AT I AMP
400 UF
4 BGGUE ELECTRIC TYPE ISJ50 SILICON RECTIFIERS OR EQUAL
4 TRANSITROIV TYPE TMI SILICON RECTIFIERS OR ECUAL
-~ H.2'5 VDC -400 MA
1% RIPPLE- AT 400 MJA
SCHEMATIC DIAGRAM - HA E CRAHK GENERATOR
FIRST USED ON 101 RFQ'D .REF. ASS'Y ITEM NO.
----O G RD
TOLERANCES UNLESS MARKED
FRAC. t .010 DEC. .003
ANG. d W
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25X1
DWN. 0
2-SK.
X15
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3.1242
3./232.
2.937
GENERA7 /? C
SHAFT D11 .3116
/. 0 00
P/,V//ONl
2 a
/ 2 TE7?,~;
43 FYTC//
50 F'/
GENERA 7'Of'y- A. c. HA.?'Jx - of / N
FIRST USED ON / C I
TOLERANCES UNLESS MARKED
FRAC. f .010 DEC. d:.003
ANG. f 1i?
DWN. CHK.. APP. DATE
I
2 SK 5/
JOSEPH 1E DITTdCO., HARTFORD, CONN. NO. IDSL
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7-0)= V1.0 Mdo,_T/N & .
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EQUIPMENT PROPOSAL
Auxiliary Power Supply Units For
RS-11A and RS-11B Equipment
To provide maximum utility for the RS-11A and RS-11B, it is
desirable to have power supply units available to permit
operation from other sources than the self-contained battery
pack. Three power supply units are considered and described
in this proposal. These are 1) an AC Power Supply, 2) a
hand-cranked generator and 3) a gasoline engine generator.
In each case, equipment weight is to be kept at an absolute
minimum to insure good portability. At the same time, the
design must take into account the great importance of relia-
bility and in no case has any sacrifice been made in this
direction.
The Power requirements of the RS-11A/B equipment have been
determined to be 0.96 watts during receiving and 20.7 watts
during transmitting. We have planned these auxiliary power
supply units so that they will provide excellent operation
of the RS-11A/B equipment. The three tubes used in the
transmitter are of the filamentary type; no standby power
need be expended in the transmitter during periods of
reception.
A,C. Power Supply
The RP-11 power supply has been planned to fit easily within
the carrying case designed to hold the RS-11A/B equipment.
An outline drawing is shown in Fig. 1. The proposed dimen-
sions are 3-13/32 x 1-19/32 x 7". This power supply can be
carried in the regular equipment carrying case, CC-11, in place
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Equipment Proposal
Auxiliary Power Supply Units
for RS-11A/B Equipment
of a spare battery as shown in Fig. 2.
We have planned to eliminate all interconnecting cables in
the RS-11 system. This feature will be applied to the AC
power supply also. As shown in Fig. 1, the transmitter and
receiver will plug directly onto the power supply unit.
The receiver normally requires a filament supply of 1.25
volts at 140 milliamperes and a plate supply of 135 volts at
6 milliamperes. When loaded to its normal power output, the
transmitter requires a filament supply of 2.5 volts at 1.06
amperes and a plate supply of 225 volts at 80 milliamperes.
The RP-11 will supply proper voltages for both of these
operating conditions. The receiver,plate voltage will be
regulated by a gas-discharge regulator tube. This will in-
sure optimum performance through wide variations in supply
line voltage.
The input to the AC power supply will have a tap switch to
permit operation from 70 to 270 volt AC mains. Components
will be designed for operation on any AC mains frequency from
50 to 400 cycles per second. Filtering will be included to
remove all objectionable ripple from both the filament and
plate supply voltages.
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Equipment Proposal
Auxiliary Power Supply Units
for RS-11A/B Equipment
We propose to use Hypersil cores in the power transformer and
filter choke in order to achieve minimum weight for the power
level required. We also propose to investigate the use of
germanium rectifiers and tantalytic filter capacitors. We
feel that the weight of the completed unit, including filter,
will not exceed 5j lbs*.
Hand-Cranked Generator
In the design of a hand-cranked generator for operating the
RS-11A/B equipment, it is important that we make most efficient
use of the energy that is being expended. Since there is such
a large difference between the power required during receiving
and during transmitting, both the circuit configuration and
mechanical arrangement must allow this to be reflected back to
the prime mover. Thus, it should require a very small amount
of effort on the part of the operator or his assistant to run
the unit during receiving periods.
It is important, too, that this unit be constructed so that it
can be dis-assembled merely by folding a few extended parts
toward the main body of the unit and slipped into a very compact
carrying case.
With presently proposed designs, we feel that in the folded
condition, this equipment may not require much more volume than
the RS-11A/B equipment and be packed in a similar case.
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Equipment Proposal
Auxiliary Power Supply Units
for RS-11A/B Equipment
-4-
The hand-cranked generator unit will contain some form of
regulation to insure constant output with varying speeds as
long as the speed exceeds some minimum level. This will
probably take the form of a centrifugal switch mounted on
the generator shaft which reduces the field current of the
generator when the minimum speed has been reached.
The unit will contain built-in filter equipment to remove
commutating hash from the filament and plate circuits. It
is also important that this filter be mounted directly on
the generator unit in order that it should be effective in
reducing radiated electrical hash from the leads and
equipment.
The hand-cranked generator unit will provide the operating
voltages listed previously to provide proper operation during
both transmitting and receiving periods. The plate supply
voltage for the receiver will be regulated by a gas-discharge
regulator tube to insure optimum performance under all
operating conditions.
During this development program, work will be conducted to
study the relative merits of foot-crank versus hand-crank
operation. It is obvious that the big muscles of the legs
are more capable of providing work output for sustained
periods than the arms. It remains to find an acceptable
design of the generator unit which can make good use of this
leg power. It is possible that such a unit would be smaller
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Equipment Proposal -5-
Auxiliary Power Supply Units
for RS-11A/B Equipment
in size than a hand-cranked unit due to the lack of need for
the supporting structure.
Gasoline-Engine Generator
Through a cooperative arrangement with the Special Purpose
Engine Co., of New York, we have designed a gasoline-engine
generator using their smallest, high reliability engine.
This engine has been designed around some earlier British
Equipment and for the output we require, weighs less than 10
lbs. It has been tested, during the past three years, by the
Air Corps and been found to be easy starting and highly
dependable.
We plan to use with this engine the same generator unit des-
cribed above for the hand-cranked equipment. The generator
will include voltage regulation facility which will insure
constant output voltage under any speed variation that may be
encountered.
The engine unit is fitted with a muffler-silencer which makes
its operation extremely quiet. It will be fitted with a
shielded ignition system to eliminate any radiated electrical
noise. The generator, too, will be fitted with an appropriate
filter to remove all traces-of commutator hash from the leads.
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 Sanitized Copy Approved for Release 2011/09/20: CIA-RDP78-03424AO02400050011-0
Equipment Proposal -6-
Auxiliary Power Supply Units
for RS-11A/B Equipment
We propose to package this entire gasoline-engine generator
in a case no larger than 6" x 10" x 12" and its outer surface
can be made to look much like a suitcase. It is estimated
that0the weight of the complete equipment will be less than
fifteen pounds.
It is our feeling that this engine-driven power supply will
be the most convenient means of operating the RS-11A/B
equipment.
Sanitized Copy Approved for Release 2011/09/20: CIA-RDP78-03424AO02400050011-0
 Sanitized Copy Approved for Release 2011/09/20: CIA-RDP78-03424AO02400050011-0
POWER
SUPPLY'
R
Sanitized Copy Approved for Release 2011/09/20: CIA-RDP78-03424AO02400050011-0
 Sanitized Copy Approved for Release 2011/09/20: CIA-RDP78-03424AO02400050011-0
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Sanitized Copy Approved for Release 2011/09/20: CIA-RDP78-03424AO02400050011-0