RESEARCH AND DEVELOPMENT OF CACHE MARKER SYSTEM PHASE II: DEVELOPMENT OF ENGINEERING PROTOTYPE FINAL REPORT

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03153A001300030011-5
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 97
• Document Creation Date: December 23, 2016
• Document Release Date: April 30, 2014
• Sequence Number: 11
• Publication Date: March 15, 1954
• Content Type: REPORT

Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03153A001300030011
4..,,.;�..;,�-1.-e,..,t1.1.14.44:�����. -
� � � .���' -
nt-t � � �
-;-5��� ����;;10 -.=-����
- 7 --Or �
"��.:
'4.7;1;;41" �
--'"
.`1 � %.� '''/C�er4'...0.
Ventr-4FA;
� � � r �
���-.
' � �-�
*".4;< � "-� - ���
riT-

C.C.41VIENT NO
45,:flONANGE IN :CLASS.
DECLASSIFIED
"bg4is
CHANCED TP:
4100' REVIEW DATE:
HR 70-
h/10/
-4�'-''''44P."..." - ..,-'1C... ii.; .'�APO;Tr�-14.g'7`,- '' -..fs.:9;..::_::
14.00;:?`,44:12,,,�,������.4.:;:p...:�".���� ".�74.:-�,11r..Z.-.1.7.4- A �......4 i -2 -,:��������', �...7:. X.
..c,.....f.. -..-e�.:::..e:7; ;,......."F..':, � -. . ;rt.:
.--*FN.---''''::3-4.-re-i4s�-,-�''''
: -,ifeir� '*,...... �,���� 2. ``�4�..
.,..areo..t. ....,.. , ,,...?,..a..-�,=,-.:�-1. -
c,.--7-J�P:7::-.."-:....,�:- -,--.. ''''...:-.-:.::,
_.--. - ...�:"TP.t. :;,.-
..r.... ,'
f. �.� � ;,T7.-'4';;Q���1,--,,,-4:�. - �.. ' ....
a acep.i>......:::44:�:7�.04-..V.,..."'''''.fi. s"-- �'-''
......... .�:"N.e:15.4cal-..7' , ,,,, � .f:-...--�t.....za,..,!..� :��� .... ..
4'.40Y..'' . , .7,-...� 4-, .41--r�--...�,-,.- a and b varies as (1/c).
The value of Lab/v115 is completely defined by the value of k.
Keeping this in mind, consider a graph where X - ; and Y ro and constant k
lines are plotted. To see what this gives, we write:
1 (a b)2 02 a b 1 c2
12 14ab
1 1 a b c2
14(1cl -
or
In terms of X and Y
1 1 1 /2
4q2 - 'm X
which can be rewritten as
2 1
I2 1.1 2-41 ( t2 1)
2 1 1
which is the equation of a circle of radius (7(2 - 1)2 whose center is on the
2
X axis located at 2(12 -
1)�
*Charles D. Hodgman, M.S., Handbook of Chemistry and Physics, Chemical Rubber
Publishing Company, 34th Edition, 1952-1953, pp. 234-236.
- B5 CONFIDENTIAL
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03153A001300030011-5
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03153A001300030011-5
CONFIDENTIAL
These circles connect points of equal value,
Now
r- L
so that if we multiply� byvX, g can be evaluated along each of the circles.
Typecurvesforconstantlir-and E. are shown in Figure 1j(d)0
vab
Now consider a line of constant value of Y, tangent to one of the
constant E. curves. This point of tangency gives the value of X for the given
value. of I for which L/b is a maximum. In terms of a, b, c this point speci-
a
fies the values for 13 and F for which E. is a maximum.
Thus, for a transponder& radius b buried at a depth c below the
surface of the ground, a detector coil of radius a will give the largest indi-
cation of the presence of the transponder.
A curve connecting these points of tangency gives the optimum radius
of the detector coil for any given size transponder buried at any depth. If
this curve is labeled as 100% to indicate the percentage of signal from the
transponder, then curves indicating lesser percentages of maximum signal can
be obtained. The curves for 80% and 50% are indicated in Figure 14. They
show that the increase in signal is not proportional to the increase in area
of the detector coil.
Unfortunately, the region in which we are normally interested is
where X is in the neighborhood of one or two, and Y has values of two to five.
In this region the curves for constant k and constant L/b converge and addi-
tional work would be required to expand this region. In this region the
814 -
CONFIDENTIAL
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03153A001300030011-5
\ Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03153A001300030011-5
(Th
�
�
1-
.
1
�
'*. 1 - t
C O'NS At4t---
L 1 ' . 1� ' �
--vslk+LUES
-1-
�-.V+
1

'
- -; - -
� .
�
. - ---
-
,
I
L:-.'
.
__-
-
t
!
�'--- i ''' -
. 1'
- -'t �" -'��
.
- "----""
r�,
iGO4STIM417"
1 �
�
1�344.1�JES
.
' '
i
--1
i �
.
�
�:-:-+ -
-7-17
-
-
.80?
-
----
� iil -
-I,
,
%
. -����1,---1-�-�-�-00-TIMUNti
. i�
- - -;-� - -
� - - --t
- -1-
COUP!
--
� --4- -
NO
I
� -,-
4
--
"---
joio
'
-- -
I
�F:
1
Lo4
I
t '
. -i�
t-
.
.
�
�
�
T
r
,.) _
-
..---
.
�
.
+-..
������
-�-� 4L-
4--
1-'2--
1
���
��
................
- �
��������....
-- I
_ �i ��
.
- 1. '
-- 1-�

4
0 .
..."-t-�-�-
� _
�
.
-
AMt
� .
7.- 1
Pr
Apo
. 4
- - ' 42
17
f � ;7". .
� err".7
e�
A 0 114 **:..
41
14"
ft '
kilt&
.,-4-�
�4 � .
2 �
� 4-- - �-����
)
.-/-,-
�
- -
�
,
#
.
-
� .
- ;
..__
.
i
�
.+
.
t
1
.
V
�Ft
,
,
1.:4..
... ..
, 4 ,..1 .07
,
..
Ce5
� -
.. � 1
.
� edil��
�
L

e :
� , �
�4,
.04
.
,..
,
\k -i
.i- i --
�
i
,
,
,
.,.V2�
t
3 4
i
i
i
-
, f
vAT:p9:
, . ID
-OF
ii 12 iZ
x.k1�-�:- -- i -
, ,
14.
- 'i -
ES',--OrtG
15
i -1
-
16
---- �
.., ..-...�..
17 la
1 77-'t�
19
- 1-
2
1 iskicdi
�
-t ---1=-1:04ilY-OF
1
- ...
i -
,_
I
CONSTA/frR-7;UiRVES
- AND-
CURVE-
f(r-�OPTIMUM.
--SOR
CY
COUPLING
. 1 ' :
.--:'�
.
itisTA-4.-t-LL
1 �
4,
,

,..._
t
- 85 CONFIDENTIAL
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03153A001300030011-5
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03153A001300030011-5
CONFIDENTIAL
percentage of Optimum coupling is estimated to be only about five per cent.
Improvement in the coupling of the detector can only be accomplished by
increasing the size of the detector coil or size of the transponder.
� 86 �
CONFIDENTIAL
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03153A001300030011-5
50X1
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03153A001300030011-5
CONFIDENT IAL
Appendix 4.4 Construction Details, Delta - Q System
PARTS LIST
Part Number
Description
R1, R2, R3, R23 Resistor, 10,000 ohm i watt composi-
tion, ! 10% tolerance
R4, R8, R10, R11, Resistor, 220,000 ohm watt compo-
R12, R14, R15 sition, 10% tolerance
R19
R5
R6, R18, R20
R7
R9, R13, R16
R17
R21
R22
Jl
J2, J3
P2
Resistor, 100,000 ohm i watt compo-
sition, � 10% tolerance
Resistor, 15,000 ohm watt composi-
tion, I 10% tolerance
Resistor, 150,000 ohm i watt compo-
sition, 1: 10% tolerance
Potentiometer, 25,000 ohm 2 watt
molded composition, : 10% tolerance
Type AB
Resistor, 470,000 ohm i watt compo-
sition, : 10% tolerance
Resistor, .4 ohm watt composition,
5% tolerance
Resistor, 47,000 ohm i watt composi-
tion, I 10% tolerance
Resistor, 2.0 megohm watt composi-
tion, I 10% tolerance
Jack, audio output, Type A-1
Jack, banana, hexed brass nickel
plated, with recessed head
Plug, banana, hexed brass nickel
plated, molded plastic handle, red
Plug, banana, hexed brass nickel
plated, molded plastic handle, black
-87-
Manufacturer
International Resis-
tance Company
International Resis-
tance Company
International Resis-
tance Company
International Resis-
tance Company
International Resis-
tance Company
Ohnite Resistor Corp.
International Resis-
tance Company
International Resis-
tance Company
International Resis-
tance Company
International Resis-
tance Company
P.R. Mallory & Co.
Herman H. Smith Inc.
Herman H. Smith Inc.
Herman H. Smith Inc.
CONFIDENTIAL
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03153A001300030011-5
50X1
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03153A001300030011-5
CONFIDENTIAL
Part Number Description Manufacturer
Bl, B2, B3, B20
Battery, 1 volt, 2R Radio "A" Burgess Battery Co.
battery
B5, B6 Battery, 67i volt, XX45 "B" battery Burgess Battery Co.
Cl, C2, C4, C23, Capacitor, .1 mfd, 300 vdc mstalized Tobe Deutschmann Corp.
C24, C25 paper
C6, C7, 091 C10, Capacitor, .02 mvd, 500 vdc disc Aerovox Corporation
C11, C12 ceramic
03, C5, 021, C22 Capacitor, .002 mvd, 500 vdc disc Aerovox Corporation
ceramic
C8 Capacitor, 25 mvd, 25 vdc dry elec- Sprague Products Co.
trolytic
013 Capacitor, variable air, 2 section Variable Condenser
ganged Corporation
C14 Capacitor, variable air, single James Millen Menu-
seetion facturing Company
C121 to C140 Capacitor, ceramicon trimmer, 7 to Erie Resistor Corp.
45 mmfd, Type TS2A-7
020 Capacitor, 150 sued, silver mica, Sprague Products Co.
! 5% tolerance, 500 vdc
C221 to C240 Capacitor, ceramicon trimmer, 7 to Erie Resistor Corp.
45 mmfd, Type TS2A -7
Capacitors not included in this list: 016, Cl?, 0101 - 0120, 026,
027, C201 - C220
Ll
Coil, detection, 100 turns, #50-38, ERA
single nylon Litz wire in 3 layers on
plexiglas form, with Faraday shield
L20 Choke, 150 mh, unshielded iron core, Merit
100 ma, DC res., 268 ohm, Type B G535
T20 Transformer, oscillator, primary con-
structed with 3 coil sections from
10 mh RF choke (National R100-S)
mounted on CTC LS-6 form, secondary
consists of 7i turns of #22 single
strand tinned wire wound on composition
bakelite coil from 3/4"D x 7/8"
50X1
- 88 - CONFIDENTIAL
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03153A001300030011-5
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03153A001300030011-5
CONFIDENTIAL
Part Number
Ti
Si, S2
53
Description
Transformer, impedance matching,
100,000 ohm to 60 ohm, primary re-
sistance 4700 ohm, secondary resis-
tance 3.3 ohm, Type SSO-6
Switch, toggle, DPST, 3 amp, 125 vac,
Type 216
Switch, grayhill, Series 24, rotarY,
six deck, ten position multideck minia-
ture tap switch
X20, Xl, X2, X3, Socket, 7 pin miniature mica filled
X4 bakelite with tube shield base
V20 Tube, 3V4
V1, V2, V3, V4 Tube, 1U4
V21 Tube, NE-2, neon
E7, E8, E9, E10, Shield, tube for miniature 7 pin tube
Ell.
SP1
Headphones, telex monoset, stetho-
scope design, 500 ohm impedance Division
Manufacturer
United Transformer
Company
Carling Electric Inc.
Grayh ill
Cinch-Jones
CBS-Hytron
CBS-Hytron
General Electric
Cinch-Jones
Telex Electro -Acoustic
- 89 -
CONFIDENTIAL
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03153A001300030011-5
50X1
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03153A001300030011-5
CONFIDENTIAL
11
Lvi>
3It
FIG. 4.4 (a) DETECTOR COIL FORM AND FARADAY SHIELD
16-4
3"
4r 2
16
O 0 0
O 0 0
O 0 0
O 0 0
O 0 0
O 0 0
O 0 0
6 (to
1
LFARADAY SHIELD
7 1,
4*- 1-8
5 11
8
1
90
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03153A001300030011-5
CONFIDENTIAL
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03153A001300030011-5
3 PI SECTIONS
FROM R-100S 10 MH.
R.F. CHOKE
NATIONAL COMPANY.
4 /
111111
ks-
FIGURE 4.4 (b) OSCILLATOR TRANSFORMER
91 -
Declassified in Part - Sanitized Copy Approved for Release 2014/05/01 : CIA-RDP78-03153A001300030011-5
CONFIDENTIAL