TOKYO TECHNICAL OPERATIONS

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03097A000200040168-6
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 7
• Document Creation Date: December 21, 2016
• Document Release Date: December 10, 2008
• Sequence Number: 168
• Publication Date: November 12, 1948
• Content Type: MEMO

Approved For Release 2008/12/10: CIA-RDP78-03097A000200040168-6
CI1I~IDENTIAI
12 ^oveaber 1948
Chief Engineer, PBIS
Tokyo Tecbaical operations.
1. Iou will recall our converse, on during my recent trip to Reseda
t
with reference to~
t our Monitoring Technician, CAF'-7, 25X1
in Tokyo. Recent correspondence from
Chief, Tokyo 25X1
Bureau, continues to express doubt in s a properly main-
tain and adjust the sew Dictaphone recording and transcribing equipment.
2. It is requested that you sake a study of Buddy Ia performance
and attitude on the job and advise as directly of what your findings are.
Tau should advise as to whether or not Buddy should be replaced, giving
reasons for your conclusions.
3. I insists that it is not feasible in his Bureau to
operate the Dictaphone d-2I recorders without allowing the monitors access
to the asglitier controls, particularly since a monitoring technician is
not ajys on duty.
Be believe that he can get better results in more consistent record-
ings if the recorder amplifiers are first properly adjusted by a technician
and then if all farther changes in level are made at the receiver, regar6-
lese of whether or not a soattw#mg technician is on.
Ion are requested to look into this problem when you are in Tokyo
and as a result of your study, either reaffirm our directives or report
to this office?any reasons why our directives are net applicable.
4? The kits of replacement parts for the Dictaphone belt equipment
will probably have arrived in Tokyo when you arrive. Iou are requested
to spend as much time as is necessary to instruct Bar in the sainten-
sace of this equipment and in completely going over all Dictaphone equip-
neat to put it into the beat possible working order, installing am parts
where necessary.
5. Inclosed you will find a copy of a teletype message to
indicating what equipment Kauai is expected to ship to Okinawa. Another
study of what equipment should be transferred will be made shortly before
Email is to be closed.
an
F+OR Tti4104SP p
4PIP
oe
Esc.
1. 16W 625 me me to Cie-t, Tokyo Bureau
2. 3 mast TT
3. t~9lS3A
-M"N I oft
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COPT
Chief, Tokyo Bureau 16 July 1948
Chief Zngine.r, FM
T.shni.al questions brought up in your 30 June 1948 letter to Chief, FBI8.
1. It is unfortunate that didn't have a chance to work with the 25X1
new Dictaphone equipment before he went to Tokyo. Kauai didn't r.cei.vu their equip-
ment before he left--end that was the only place he could have gotten such enperience
wit4out martin a trip to the United Ptates. In this regard, we will try to arrange
schedule on his trip to Okinawa so that he can stop over for a fee d4y825X1
an rusqu p auto has been assigned the job of building the 25X1
0kinawa station under s overall command, and probably will be going throW25X1
Tokyo in late 8eptesh .
2. W. recommend that the five Dictaphone Model A-3M recorders not be altered
eit:-er with respect to motor speed or with respect to removal of amplifier from
bottom of recorder cab j net. ?be reasons for this recommendation are given herewith.
Tne recorder speed normally shoi.?ld be constant so that the transcribing speed will
fall into the rang. of the transcriber speed variation. The speed adjustment pro-
blem becomes too inconvenient unless the recorder speed is left constant. Also,
you will be receiving five transcribers which will have speed, tone and volume
control as well as foot control for tart-arid-stop and for back spacing, The speed
control on the transcribers will fill your requirements. Accidental variation of the
speed control rheostat you night install on the recorders would possibly throw th*,
speed of recording out of range of your transcribers--when the transcribers are r.o
solved. Also, the motors on this equipment are of a synchronous type--s type which`
aces not respond to control with a rheostat very well. It is this synahroaous feature
which gives you the 17 percent speed variation between 50 and 60 cycle operation.
The motors are designed for a speed to give 15 minute belt time on 60 cycle power.
The same discussion applies to the transcribers, but the transcribers will handle
the 17 percent speed variation in either direction from normal recording speed by
changes in their motor design.
3. The amplifier on the recorders is really two scplifiers--one for recording
and one for monitoring. The recording amplifier is an audio compression amplifier.
This seans that if the volume level of input and output is properly adjusted with
the controls provided, the amplifier will tend to automatically level off volume
levels to any desired average maxiaaua output level. The input level mould be ad-
justed so that the input stages of the amplifier do not block or distort on peak in-
put levels. Then the output level is adjusted to give proper recording level from
the output of the amplifier. The higher the input signal level arriving through the
input level control to the input tube grid, for a given output level setting, the
greater will be the compression control, i.e., the greater will be the allewable
range of variations at the receiver with no need of making recording level adjust-
cents. If these level settings are properly made, the monitor does not have to touch
the amplifier controls. Actually, the machine is designed to make level adjustments
during recording unnecessary. If necessary, further adjus is of input level shomid
as made 11 thg rSM M not at the recorder. e a l o
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4. I will note that motors of the recorders run whenever the amplifier 1.25X1
turned on. We will send you a diagram of wiring changes to be made to eliminate this
unnecessary wear on actors, belts, eta. There are other changes which we have found
accessary for better operation--information on these will also be sent to you.
S. Now as a guide as to why your recordings vary in quality, let an say first
vat monitors should never make adjustments on the amplifier aQntrols. The inter-
relationships between the various controls is too bard for them to understand. 025X1
should set these controls as per instructions above and monitors should be Instructed
to sake any necessary level changes at the receiver. We have a strong suspicion that
this subject might lead to the elimination of most of your difficulties. A further
reason why quality of recordings my very greatly from the aass machine is that one
of the two recorder styli may be chipped. This may easily be determined by inspec-
tion with a magnifying glass--or by correlating closely s.oor recordings made on the
owe recording head.
6. An assortment of maintenance and replecenont parts will be shipped you soon.
Tbs five transcribers for your office are leaving soon by parcel post. Please feed
free to call on us as often ae necessary where we may be of help to you.
FOR. THE CHIEF, PSIS1
0 940f 0100
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311625
1. Ref. para. 2 your latter 10 Aug. Concerning adjustment of
controls on Dictaphone rekorders.
2. to avoid future difficulties in use of this equipment, the
following procedure is outlined for your guidance and is too be tol-
lowsd eaplioitly, without change, unless authorised by this office.
3. Rave monitoring technician obtain the proper compression
adjustment of the recording amplifier.
rpt no
4. Instruct monitors to sake no/ change in this adjustment,
5? Immediately prior to monitoring and recording of scheduled
programs-.adjust volume controls on receiver so that volume indicator
on recorder indicates 10 to 13 units on program peaks.
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381510 25X1
Following furniture to be transferred to forward site from Kauai subject to
c)ndition of such equipment at time transfer is to be made:
1. Desk; wood, with typewriter compartment, pedestal. One ea.
d. Desk; wood, double pedestal. five as.
3. Chair; wood, swivel, with or without arms. Six as.
4. Chair; typist, upholstered back and seat, best available. six ea.
5. Stand; typewriter. Three ea.
6. Lamp; desk, gooseneck. All available
7. Cabinet; upright, filing, wetal, cap or standard sire,
4 drawer. All available
8. Refrigerator; electric, 6 to 8 curt, pick frm all available.8est ten
9. Stove; electric range, 3 burner. One es.
10. Machine, washing. One ea.
11. Cabinet; upright, card 4 X 6 inch, 1 drawer. 2 ea.
12. Cabinet; upright, card 3 X 5 inch, 2 drawer. 10 as.
13. Fan; wall, electric. 9 ea.
14. Stove; kerosene, 3-burner, best available. 5 ea.
15. Table; metal, 66 X 36 inches. ] ea.
16. Typewriter, now-portable, std. elite or pica type, 11
inch, best available. 6 ea.
17. Typewriter; sow-portable, 14 inch capacity. 1 ea.
18. Typewriter; now-portable, 18 inch capacity. 1 ea.
19. Typewriter, portable, W/carrying case. 1 ea.
20. Clock; electric, desk or wall. 5 ea.
21. Dictionary, Webster, unabridged. 1 ea.
22. Case; brief, leather, lawyer types with 1o16., 01 0 a, ea.
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23.
Sate; aissellaneous, 1 and 2 door.
2 sa.
24.
Chair; straight back, bard good.
12 ea.
Remainder of requirements for new project requisitioned. Following technical
equip. to be transferred subject to condition at time transfer is to be wades
1.
Recorder; MaXl"7, siphon ink, complete with Boehae tape
pallor.
One set
2.
Recorder; Dictaphone Model A-2M,
7 ea.
3.
transcriber; Dictaphone Model BPO.
1 ea.
4.
Transcriber; Dictaphone Model TMB.
7 ea.
(Assaiader to be shipped to other units as later specified)
5.
Receiver; sids-end selector, McLaughlin.
6.
Receiver] da'licrafters 81-29, f1-28A, or BX-32, beat
10
10 ea.
7.
lulticoapler; with power supply, cables and patch panel
(1 medium wave, 2 standard)
3 ea.
(Resaising 4 unite to be shipped to mainland to destinations later to be
specified)
S.
Charger; battery.
2 ea.
V.
Compressor; air, electric.
1 ea.
10.
Compressor; air, W/gas engine.
1 ea.
U.
Gun; greave, air.
1 ea.
12.
G= j spray, type GM-42306x1.
1 ea.
13.
Jack, floor.
1 ea.
U.
Machine; calculating.
1 ea,
45.
Machine; duplicating, with spirit.
1 ea.
16.
rower; laws, gas power.
1 ea.
X17.
Puap; barrel.
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E.
Saw; meter, with frame.
1 ea.
19.
teal.; platform and postal.
2 ea.
20.
Bedaa; ford, 5-passenger 1948.
1 ea.
21.
Standard; frequency cater type SC 121T.
1 ea.
22.
Standards frequency, Mlles model 90505.
2 is.
21.
Test set; volt Ohsgst Jr., RCA Yodel 165A,
1 .e,
Dictaphone max cylinder equipment will be turned in to Dictaphone Corp. when
ordered from here.
All electronic parts, small items, tubes, etc., will be sent to new station
as soon as they can be spared-..van before new station is activated. Only necessary
spaar.. to last mntil Cauai's closing date will be kept. This includee speakers, rack
panels, racks telephones, etc.
Remainder of test equipment and receivers to be considered surplus. Power saw,
grinder and drill press to be shipped to states to location*- to be specified later.
Final decisions on remainder of service.ble property to be made shortly before
transfer of activity of new station is to be made. 6urplur property meyy be disposed
of by Services Branch at anytime.
-3-
0 RUUVAx0O
Approved For Release 2008/12/10: CIA-RDP78-03097A000200040168-6