Knight 96RX635 User manual

PnoToFACT* F.,lJ"*
TAPE
TIMER
KNOB
RADIO
P.A.
PHONO
INPUT EXT.
SPEAKER
JACKS
MIKE
INPUT
TONE
CONTROT
RECORD
rocK
BUTTON REVERSE RECORD
Figure I
GENERAL INFORMATION
The Knight Model 96RX635 features fingertip operation for Fast Forward, Playback, Stop ,
RecordandFastReverse. Double-trackrecordingis used, giving two full length recordings on a
single reel of Tape. Any size up to 7" can be used. Two neon recording indicators simplify the
recordinglevelsetting. Newrecordingscanbemade on previously recorded tape since the erase
headisautomaticallypositionedwhentheRecordbutton is pressed or the same recording may be
played back indefinitely. Recordings can be made from a radio, television receiver, or phono-
graph, in addition to those made directly from the microphone. Recordings can be played back
throughtheself-containedspeakers, or an external speaker through use of the External Speaker
Jack-
Using both channels of the tape, the recording time is as follows:
KNIGHT
MODEL 96RX635
SPEED
CHANGE
RECORD
LEVET
INDICATOR
VOTUME
CONTROT
ON.OF
swrTcH
FORWARD 3
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SIZE
5" reel
7t' reel
SPEED
w
t hour
2 hours
SPEED
w
l/2 hour
t hour
TheKnightisdesignedtooperateon 60 cycle, 115 volt, AC supply only. Before connecting
to your line supply, be absolutely certain that it agrees with the above specifications.
Allied Radio Corporation
833 West Jackson Boulevard
Chicago ?, Illinois
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fhis moleriol compiled ond published by
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Copyright 1955 . All Rights Reserved
0AIt ll-55
INDIANA
SET 2 9E TOLDER T
HOWARD l/.

BIAS
ADJUSTMENT NORMAL INNKATQR
ADJUSTMENT
QVERTOAD
INDICATOR
ADJUSTMENT
Figure 2
OPERATING INSTRUCTIONS
Preparation For Operation-
1. Removethe AC power cord, b" reel of tape,
emptyreelandthe microphone from the storage com_
partment.
2. Depress the "Stop" button.
3. Plug the AC cord into a convenient wall re_
ceptacle of the proper rating.
4" Set speed change knob to ?. b0 or 3. ?b as de_
sired.
5. Place Remote- Normal switch in "Normal"
position.
CAUTION: Do not turn speed change knob unless "Stop"
button is depressed.
When the Forward or Reverse buttons are de-
pressed, the Record and Play buttons are locked so that
they cannot be pressed down, with the possibility of
spilling tape. The buttons should always be pressed
down firmly until they latch and the Stop button must
be depressed before changingfunctions or speeds of the
recorder.
IMPORTANT: Always depress the Stop button when
the machine is not in use.
Page 2
Speed Change Knob
Thearrowonthe speed change knob should point
al 7.50 or 3. ?5 according to the speed desired. This
recorderhastwospeeds, 7 l/2" and3 3/4"per second
Thearrowpointingat 7.50 means the unit will operate
at the fast speed or 7 L/2,, per second.
CAUTION: Turningthe speed change knob white the unit
is operating will not change the speed.The
Stop button rnust be depressed before thd
speed can be changed.
Threading The Tape-
1. Place a full reel of tape on the left (suppiy)
spindle. making certain one of the reel slots catch the
protrusions of the pan. Unwind about 14r' of tape from
the supply reel.
2. Insert free section of tape into the tape slot.
3. Insert free end of tape into one of the three
slots in the hub of the right (take-up) reel and while
holdingthe tape inplace givethe reeltwo or three turns
until the tape is secured.
4. The dull side of the tape should always face
away from the operator (rear of unit).
To Record From Microphone-
1. Turn the On-Off Volume control to the right
until a click is heard and allow about 30 seconds for

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the unit to warm up. The pilot light located above the
Stop button will glow when the unit is turned on.
2. Insert the microphone plug into the ilMicro-
phone, input.
3. Move the record lock button (27) downward
with the left hand. This releases the safety lock which
prevents accidental erasure.
4. Depress the ilRecordr button with the right
hand (while holding record lock button (2?) with the
Ieft hand) until it latches.
5. Adjust the 'Volume" control until the 'Normal"
indicator just flashes, while speaking into the micro-
phone. Whenthe "Volume" control is advanced too far
the "Overload" indicator will flash and the recording
will be distorted. T o prevent overload, Iower the
"Volume" control to a point where the " Overload It
indicator will not flash.
6. The "Tone" control does not operate during
recording. When recording from radio, setthe radio
"Tone" control for maximum treble"
To Record FTom External Radio, TV, Or Phonograph-
1. Insert the phonograph pickup plug into the
"Radio-P. A. -Phono" jack.
2. For radio or TV recording, connect patch
cord, part No. C20.233 to the voice coil of the radio
or TV receiver speaker by means of the alligator clips.
PIug into "Radio-P. A. -Phonoil jack.
3. Proceedas describedunder "To Record From
Microphone".
NOTE: Remove patch cord after recording is com-
pleted.
To Use Second Track-
1" Depressthe "Stop"button whenall the tape has
wound onto the take-up reel"
2" Removereel containingtapeandplace on left-
hand supply pan.
3" Place empty reel on right-hand take-up pan"
4" Thread tape as previously described.
To PIay Recordings-
1" Turn on unit with "Volume" control knobo
2" Thread tape as described under "Threading
The Tapeo "
3. Set the speed change knob (1) to the speed at
which the recording was made.
4. Depress "PIay" button until it latches.
Page 3

5. Adjust "Volume" and "Tone" controls to de-
sired listening level.
High-Speed Forward Or Reverse-
When it is desirable to play a certain portion of
the tape over again it is not necessary to rewind the
entire tape, By depressing the'Forward'or'Reversd'
button the tape will advance (or reverse) at a rapid
speed.
Several minutes of normal recording can be skip-
pedin a few seconds by the "Reverse[ and ,'Forward"
buttons.
Tape Timer-
If , when maling re cordings or playing a re corded
tape, you wish to play back a certain recording, note
thereadingon the timer scale when the particular re-
cording is being made or heard" Rewi.nd the tape until
thenumberyouhave noted appears on the scale, press
"Stop"button, thenpress "Play"buttonand you are now
listening to the recording you wanted"
Whenstartinganew reel of tape or re-recording
a reel, reset the indicator pointer to "O" by rotating
the reset knob. By starting at tro, on aII tapes, the
number location can be cataloged for each selection
on any reel.
To Edit And Splice Tape-
NOTE: Since it is impossible to edit and splice one
track without affecting the other, recordings
which are to be edited should be limited to one
track only.
1. Thetapemaybeeditedby cutting out unwanted
portions, or by joining selections into another sequence.
Announcements may be inserted between selections,
etc. Unused sections oftape can be spliced together for
re-use.
2. Forbestresults, cut tape at a slightdiagonal
join ends together with splicing tape on the glossy side
and trim off any excessive width.
Erasing Recorded Material-
Whenthe record button is depressed, the erase
head is automatically positioned, erasing any previous
recording before a new one is made. you may erase
materialno longer needed, without recording, by de-
pressing the "Recordtt button and turning the'nV'olumerr
control knob to the minimum volume position or ex-
treme counter-clockwise position just before the re-
corder shuts off. One track is erased at a time. To
erase the second track, reverse the reels and repeat
the above operation.
To Use Recorder As A Public Address System-
Insertthe microphone plug into the "Microphonen
input jack. Plug in an extension speaker or speakers
if desired and depress the ttRecord" button. Set the
lVolume"and "Tonern controls to the desired listening
level. A recording can be made at the same time with
a tape placed on the unit in the normal manner.
CAUTION: Whenusingthepublic address feature, see
that the microphone is as far away from the
speakers as posnlble, to prevent 'Teed-
back" squeal.
Page 4
Remote Control Operation-
A socket and switch are provided to allow remote
operationup to a distance of 18 feet, either recording
or playback. This is accomplished by means of a re-
mote control cable (Mod. No. HC-12). Connect attach-
ment cord as follows:
1. Insert remote control cable plug into remote
socket. Be sure remote control switch on end of cable,
is in "Standby" position.
2. With control switch on the recorder in ttNor-
mallposition start the unit in the regular manner and
set ilVolume" control to the proper level.
3. Place control switch on the set to I'Remotet'
position. Tape will come to a stop.
The recorder can now be operated (start and stop)
by means of the remote cable switch. When starting
the recorder by means of the remote control, the switch
should be rotated to the nMotor" position and then after
a slight pause rotated to the "Record-Play" position.
To stop re cording or playback, rotate the control switch
directly to "Standby" position, palrsing slightly at the
"Motor" position. ADJUSTMENTS
Record-Play Head Adjustment-
ffi Toadjustthe record-playhead (60) for maximum
frequency response, make the following adjustment:
1. Removethe rear escutcheon (6) and rear ea-
cutcheon plate (26).
2. Properly thread an alignment tape or a good
recorded tape on the machine.
3. Setthe controls as described under trfo play
Recordingsr'.
Grip the vertical portion of the record head
mounting bracket with a pair of long-nosed pliers. Rock
themountingbracketandrecordhead from side to side
slightly until the maximum high frequencies are ob-
tained. Bend the bracket with the pliers to obtain a
permanent set at this position.
Pressure Pad Adjustment-
@t*-""" * front escutcheon (10).
2. Depress the "Play[ button. Do not turn the
recorder on.
3. Use a pencil type postal scale and check the
amountofpressurenecessary to just pull the pad away
from the tape. The test should be made on the end of
the pressure pad mounting spring (6b). Adjust the
pressure pad for t 3/ 4 oz, +t/ 4 oz. pressure.
(a) The record head pressure pad is adjusted by
the locked adjustment screw (b4).
(b) The guide post pressure pad (53) is adjusted
by bending the pressure pad spring. It must
be adjusted for minimum pressure against
the tape.
4. After the adjustments are made depress the
"Stop" button and replace the front escutcheon.

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Erase Head Adjustment-
1. With tape properly threaded, turn recorder
onanddepress the "Record" button. Allow tape to run
for a few seconds then turn recorder off, but leave
"Record" button depressed.
2. With the escutcheons rernoved check the erase
head (5?) to see if it is paraltel with the tape.
3. Check to see if the top edge of the tape coin-
cides with the top end of the diagonal slot in the erase
head (junction of long diagonal slot and short vertical
slot). To adjust level of tape, loosen set screw (4?),
see exploded view, and rotate tape guide post (48) to
move tape up or down. Tighten set screw (4?).
4. After this adjustment has been made, check
to see if the tape moves forward approximately l/ 64,'
whenthe "Record.'button is depressed. If not, loosen
theforwardadjustmentscrew(119), see Figure 2, and
turn the screw in or out as required to obtain this l/ 64,,
movement. Tighten the lock nut.
Brake Shoe Adjustment-
1. In order to adjust the brake shoes, the com-
plete mechanism must be removed from the carrying
case and the speaker disconnected.
2. With all push buttons in the up position the
brake shoes (140) should clear the drums by approxi-
mately L/ 8".
3. Depressthe "Stop"button while observing the
brake shoes. Both brake shoes must contact the drums
at the same time and with equal pressure.
4. The adjustment is accomplished by bendingthe
spring arm (189).
Adjustment For SIow Take-Up Reel-
There are some instances where the spring drive
bett (20), see Figures No. 2 and No. bA, stretches after
a periodof time. Whenthis happens, the takeup torque
willbeinsufficienttowind tape properly onto the take-
up reel. Inthis case, the belt should be replaced as fol-
lows:
Remove rear escutcheon (6) and rear escutcheon
plate (26). Remove take-up reet pan (18). With the
"Stop"buttondepressed, remove old spring drive belt
fromaround pressure roller (70) and lift belt clear of
recorder. Install new belt by reversing the above pro-
cedure.
Bias Adjustment-
Turn the--recorder on and depress the "Record"
button; use no tape. To determine if the bias is within
satisfactory limits without dismantling the unit, merely
connectaVTVMfromthe top lug of the recording head
tochassis. If ?5to 100 volts are present no adjustment
is necessary.
Ifthe readings are outsideof this range, proceed
as follows:
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Figure 5A. Exploded View Of Parts Above Baseplate
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A PHOTOFACT "EXPLODED" VIEW
@ Horard W. Sams & Co., lnc. 1955
NOTE
EXPLODED VIEW OF
MOTOR I PULLEY
MOUNTING ASSEMBLY
- TOP VIEW
Figure 5B. Exploded View Of Parts Below Baseplate
Page ?

1. Try a new 12AY?, l2A)K7, 6Ae5, and by3.
2.If still not within range, remove the chassis
and connect a low capacity VTVM from test point 'A'
to chassis. Use low scale. Adjusttrimmer M?formax-
imum reading. Adjust trimmer M4 to obtain a reading
ot2.25 volts. This provides the optimum in perform-
ance.
Neon Record Level Indicators-
The neon record indicator firing level adjustment
is onlyrequired if aneonbulbis replaced. The two neon
indicators are adjusted for correct firing level by means
of two trimmer capacitors, one for each indicator,
To adjust indicators proceed as follows:
1. Turn recorder on and depress 'Tlecord" button.
2. Connect a short jumper lead across the bias
oscillator coil, L1 (short out the coil to disable the
oscillator).
3. Connect an audio oscillator, set at 1000 cycles ,
into the microphone input jack. Output of audio oscil-
lator shouldbe approximately . 01 volt. (A1 volt output
levelmay be used with a 100 to 1 reduction pad of re-
sistors inserted between the audio oscillator and the
microphone jack).
4. Connectprobe of low capacitytype AC VTVM to
testpoint"B"(junctionof two 330K resistors, R28 and
R29mountedon a terminal strip near the volume con-
trol).
5. Adjustvotume controlto obtain a reading of 36
volts on VTVM and Ieave control set and VTVM con-
nected.
6. Disconnect shorting jumper from across bias
oscillator coil.
?. Adjust'tlormal"indicator trimmer MbA fully
clockwise and then turn slowly counterclockwise so that
uponlooseningthe trimmer the "Normal" bulb barely
lights. This adjustment must be made loosening the
trimmer.
8. Short out the bias oscillator coil.
9. Increase volume control to obtain a reading of
88 volts on the VTVM.
10. Remove short from bias oscillator coil
11.Adjust "Overload'. indicator trimmer M5B
as described in step "7,' for just barely lighting the
"Overload" indicator bulb.
IMPORTANT: Do not readjust the recording bias
oscillator after setting the indicator
light adjustments.
TROUBLES
Push Buttons Fail To Latch Into Position-
1. Spring (52) loose or broken, resulting in the
erasehead (5?) not being pulled forward to engage the
tape.
2. Erasehead not aligned properly. See "Erase
Head Adjustment".
No Fast Forward Or Reverse-
1. Idler lever tension spring (?8) may be loose
or brokenl if so, idler lever (138) will not be actu-
ated.
2. Checkidlerdrivebelt(103)toseeif it is prop-
erly connected.
No Drive On Record Or Playback-
1. Idlertenslonspring(154or 160) loose or bro-
ken, thereby not holding idler wheel (144) in engage-
ment with motor pulley (147) and flywheel (116).
2. Idler slideplate(162)binding on slide bushing
(161), thus preventing idler wheel (144) from moving
forward.
Tapg. F?ils. To Wind On Take-Up Reel During Record
Or Playback-
1. Reel drive spring (20) loose or broken. See
'Adjustment For Slow Take-Up Reel".
2. Brakedrumshaft(118) binding. Clean foreign
matter from bearing surface.
Speed Variation Or "Wow"-
1. Check the capstan(39), pinchroller (?0), idler
wheel(144), motorpulley (14?), and ftywheei (116) for
oil or foreign material on their driving surfaces. Clean
these parts with a good cleaning fluid"
2. Check motor pulley (14?) to see if it is secured
to motor shaft.
3" Checkidlertension spring (1b4 and 160); see
if theyare holdingidler wheel (144) in firm contact with
motor pulley (14?) and flywheel (116),
. 4. Idlerslideplate(162)bindingon slide bushing
(161| preventing idler wheel (144) from making positivL
contact with the motor pulley and flywheel.
CLEANING
Therecordhead(60), capstan (3g), and pressure
roller (?0)are subjectto an accumulation of tape coat-
ing residue, which is worn off the tape as it passes
these parts. Use a soft cloth and alcohol to clean the
head surfaces, capstan and pressure roller.
CAUTION: Donotuseabrush orany metal object when
cleaning the recording head as this eould
mar the metal pole piece.
LUBRICATION
AII rotating parts are provided with generous size
oilite bearings, which are factory lubricated and re-
quire no further attention.
An occasional cleaning out of foreign matter under
theplastic pushbutton cover is desirable, and a small
drop of oil on the sliding lever members is advisable.
1. Lock plate spring (44)
sulting in the lock plate not being
bracket (41).
Fails To Erase-
Page 8
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Page 9

Bottom View Of Amp. Chassis
ELECTRICAL PARTS LIST
Ref
No. Part
No. Description Ref.
No. Part
No. Description
y1
V2
v3
V4
V5
ClA
C1B
C1C
tlD
C2A
J2c-
J2C
^o
vr)
J4
l5
36
J7
l8
1q
69-2224
69-2175
69-2t7t
69-2171
69-222t
B-5.437
c-4. 109-9
c-4. 109-13
c-4. 109-13
D-3. 100-18
c-4 l nq-,
12AYT Bias Osc. -Mic. Pre-Amp
12AX? AF Amp. -Phase Inv.
6AQS Output
6AQS Output
5Y3GT Rectifier
Elect. 20MFD@)450V.
Elect. 20Mm@450V.
Elect. 20MFD @450V.
Etect.20Mm@25V.
Elect. 3OMFD@250V.
Elect. 3OMFD @ 250V.
Elect. 30Mm@) 25V. Not Used
E1ect. 3OMFD@450V.
Cap. Ceramic 1000MMF
Cap. Ceramic 1500MMF
Cap. Ceramic 1500MMF
Cap. Molded Paper. 05MFD@
200v.
Cap. Ceramic 10000MMF
Can Cerernic 4?OMMF''
c10
c11
c12
c13
ct4
c15
c16
C1?
c18
c19
c20
C2L
c22
c23
c24
c25
c-4. L09-27
c-4. 109-9
c-4. 109-2
c-4. 109-10
D-3. 100-18
c-4. 109-10
c-4. 109-10
c-4. 109-27
c-4. 109-13
D-3. 100-19
D-3. 100-19
Cap. Ceramic 220MMF
Cap. Ceramic 10000MMF
Cap. Motded Paper .033@600V.
Cap. Ceramic 1000MMF
Cap. Ceramic 470MMF
Cap. Ceramic 100MMF
Cap. Ceramic 5000MMF
Cap. Molded Paper. 05Mm@
200v.
Cap. Ceramic 100MMF
Cap. Ceramic 10000MMF
Cap. Ceramic 100MMF
Cap. Ceramic 220MMF
Cap. Ceramic 1500MMF
Cap. Molded Paper. 05MFD@
400v.
Cap. Molded Paper. 05MfD@
400v.
Cap. Molded Paper. 033MfD@
600v.
Page 10

ELECTRICAL PART LIST-Con't
Ref.
No. Part
No. Description Ref.
No. Part No. Description
c30E
c26
c27
c28
c29
c30A
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
Rl5
R16
R1?
R18
R19
R20
R21
n,22
c-4.109-13
c-4.109-9
D-3.100-58
c-4.109-34
B-4.131
B-4. 131
c-8.227-2
c-8.231-1
c-8-207 -7
D-?.101-121
D-7.102-134
D-7.t02-L26
D-?.101-114
D-7.101-1?8
D-?. 102-80
D-7.102-tt2
D-?.101-58
D-?.101-93
D-?.101- 128
D-?.101-1?8
D-7.101-114
D-7.103-153
D-?.101-86
D-?.1"01-155
D-7.101-44
D-?.102-112
D-'.t"r02-Lt2
Cap. Ceramic 1500MMF
Cap. Ceramic 1000MMF
Cap. Molded Paper. 015MFD €)
600v.
Cap. Ceramic 20MMF
Cap. Ceramic Dual Disc
4OOOMMF
Cap. Ceramic Dual Disc
4OOOMMF
Vol. Cont. & Sw. Assy. lMeg@
t/2 w.
Tone Cont. 250K@l/2 W.
Hum Cont.500Q
Resistor 330K@ l/2 W.
Resistor 1.5Meg@1/2 W.
Resistor 6B0K€) l/2 W.
Resistor 2?0K€)1 W.
Resistor 220K@ L/2 W.
Resistor 4. ?Meg@ L/2 W.
Resistor 22K€)1 W.
Resistor 120K@1 W.
Resistor 10K@1/2 W.
Resistor 68K@1/2 W.
Resistor 4?0K@1/2 W.
Resistor 4.?Meg@ l/2 W-
Resistor 22OK@l/2 W.
Resistor 39KG)2 W.
Resistor 47K@L/2 W.
Resistor 2.2lrIeg@l/2 W.
Resistor 4.7K@l/2 W.
Resistor 120K@ 1W.
Resistor 120K@ 1W.
B
R23
P"24
R25
R26
F-27
R28
R29
R30
R31
R32
R33
R34
R35
,T1
T2
sP1
sP2
L1
L2
M1
M2
M3
M4
M5A
M5B
M6A
M6
M?
D-?.101-114
D-?.101-114
53-2825
D-7. t02-72
c-6.215-10
D-7.101-121
D-7.101-121
D-7.101-128
D-7.lO2-12
D-7.102-23
D-?.103-58
D-?.103-23
c-35.804A'
c-9.261C
c-30.341-2
D-30.341-2
B-1. 55?
B-1.556
45 -2003
45-2036-0
45-2036 -0
c-4.t42A
B-4.140
B-4. 140
c-4.t42A
Resistor 22OK@l/2 W.
Resistor 220K€) l/2 W.
Resistor 2?0O@)2 W.
Resistor 15K@1 W.
Resistor 3.30@?W.
Resistor 330K€) 1/2 W.
Resistor 330K@1//2 W.
Resistor 4?0K@ l/2 W.
Resistor 15K@1 W.
Resistor I20{'I@L/2 W.
Resistor 1K@1 W.
Resistor 220f,l€)2W.
Resistor 334€)2W.
Power Trans. & Plug Assy.
Output Trans.
Speaker 8f,lPM
Speaker SQFM
Bias Osc. Coil
Tone Choke
Pilot Lamp #44
Neon Lamp NE51 (Normal Ind. )
Neon Lamp NE51(Overload Ind)
Trimmer Bias Adj. (3-35MMF.)
Trimmer Normal Ind. (5. ?0MM.
Trimmer Overload Ind.
(5-70MMF)
Play-Record Sw. (Viewed From
Rear)
Play-Record Sw. (Viewed From
Front)
Trimmer, Bias Osc. Freq. Adj.
(850-115oMMF)
MECHANICAL PARTS LIST
3
o
E'^
tt
€9
or+
Va
x
O.
G'
lrl
Ref.
No. Part No. Description Ref .
No. Part
No. Description
1
2
3
4
5
6
7
8
9
10
11
t2
13
t4
15
16
t7
18
19
20
2L
22
23
24
25
26
27
28
29
30
c-13.253-4E
57 -2049-4
?3 -2334 -1
B-13.261-1
B-28. 163
D-13. 292-2F
5?-3445 -1
c-13. 254-?E
73-2254-3
E-13.293-3F
48-2213-r
B-19. 985-1A
B-33.453
54 -2030-35
B-33. 3?0
73-2254-3
57 -2552-2
B-13. 262-1
5?-36?8-1
B-31. 351
B-32.302
73-223t-3
57 -2552-r
?3 -2334 - 1
35-851
B-19.9?5-38
B-32. 308-1
57 -2L09-2
33.415
54 -2030-35
Speed Shift Knob
\Screw #6-32 x 1/4BHMS
#6 Cantlink Washer
Reel Pan For Feed Reel
Linen Washer
Rear Escutcheon
#B-32 x 3/SPhillips RHMS
Tone Control Knob
Felt Washer
Front Escutcheon
Hex. Nut 3/B-32 x L/2
Bracket for Input Jack
Midget Jack
Drilled Rivet L/4 x 122 x 7/32
Phono Jack
Felt Washer
Screw 6-32 x 1 1/4PhillipsRHMS
Reel Pan for Take-Up Reel
#4-40 x 5/16 Phillips OHMS
Reel Drive Spring (Belt)
Timer Knob
#4 Internal Lockwasher
#6-32 x 1 /4PhillipsRHMS
#6-Cantiink Washer
Timer Shaft and Pointer Assy.
Rear Escutcheon Plate
Record Lock Button
#6-32 3/16BHMS Brz. Phillips
"Et' Ring Retainer
Drilled Rivet 1/4 x 122 x7/32
31
32
33
34
35
36
37
38
39
40
4l
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
5B
59
73-223r-5
48-4 10-1
73-2234-3
48-410- 1
73-2234-3
B-19. B?6D
B-33.446
D-35.80?-6F
B-32.259F
B-31.337B
B-19.859-1F
57 -3445-1
B-19. 870.A
B-31.343A
73-223I-4
5?i- 3603 - 1
5?-3439 -0
B-32. 300D
B-32. 260D
B-35. ?94
B-31.34?B
B-31.334A'
57 -428-L
73-2233-r
48-22t6-L
c-35. ?564'
B-3s. ?66C
B-32. 309
#BInt. Lockwasher
#6-32Hex. Nut
#6-Ext. Lockwasher
#6-32 Hex. Nut.
#6 Ext. Lockwasher
Push Button Lever
Spacer
Base Plate Assy.
Capstan Shaft
Push Button Return Spring
Hinge Bracket for Push Buttons
#8-32 x 3/B RHMS
Locking Plate for Push Button
Lock Plate Spring
#6 -Int. Lockwasher
#6-32 x 1/2Phillips BHMS
#6-32 x 3/16 BristolHead Set
Screw
Tape Guide Post (Left)
6-32 Hex. Nut
Tape Guide Post Spacer
Erase Head Plate Assembly
Erase Head Tension Spring
Pressure Pad (Felt)2 used
#6-32 x 3/8 RHMS
Int. Lockwasher
#2-56 x 3/16Hex. Nut
Erase Head
Record Actuating Lever
Tape Guide Post (Right)
Page 11

MECHANICAL PARTS LIST - Con't
Ref .
No- Part
No. Description Ref
No. Part No. Description
60
61
62
63
64
65
66
6?
68
69
70
7l
72
73
74
75
76
77
78
?9
80
81
82
83
84
85
86
87
88
89
98
99
100
101
r02
103
104
105
91
92
93
94
106
10?
108
109
110
111
c-36.1568
B-19. 881C
73-224t-t4BF
B-31. 336D
B-35. ?58
B-35. ?64D
B-33.412
B-19. 86BA
B-33.409
73-2340
B-33.404E
B-19- 858
73-2340
B-35.8244
1 10-48-B
B-31.338B
c-35.835
B-33.412
B-31.339
B-35. ?59
B-35.7?4
B-31. 333
13-224t-ttg
54-2030-35
73-2231-5
57-2L02-3
B-19. 863
D-33.445
B-32. 301
B-28. 163
c-35.823
B-35. ?5?D
B-32. 2?5-1E
B-35.405E
73-2254-6
73-224L-I50
B-33.409
B-33.118A
73-224t-r50
B-33- 418
73-2254-6
B-33.406C
B-28.162
c-35.816
5?-3589- 1
57 -2t09-2
57 -3679-1
5?-3589-1
B-35. ?55-5D
D-35. ?53-1
73-223L-5
Tape Recording Head(Shure
TR16H)
Playback Actuating Lever
FIat Washer
Pinch Roller Tension Spring
Playback Slide Plate Assembly
Pressure Pad Spring Assembly
Push-On Stud Nut, 3/16"Stud
Record Slide Plate
Hairpin Clip
Linen Washer
Pinch Roller
Push Button Retainer Bracket
Linen Washer
Pinch Roller Plate Assy.
Switch Lever Assy.
Brake Return Spring
Brake Slide Plate Assembly
Push-On-Stud Nut, 3/16 Stud
Idler Lever Tension Spring
Shift Plate Assembly
Record Interlock Assembly
Switch Arm Link
Flat Washer
Drilled Rivet 1/4 x 122 x7/32
(Bottom View of Item 38)
#8 Int. Lockwasher
#8-32 x 1/4 RHMS
Drive Mounting Plate Bracket
Gear Train for Tape Index
Brake Drum Shaft (Grooved)
Linen Washer
Brake Drum & Bushing Assy.
Sub. Idler Plate Assy.
#8-32 IIH Shoulder Screw
Sub. Idler Wheel
Felt Washer
Flat Washer
Ilairpin Clip
Spacer
Flat Washer
Truearc Retaining [Err ring
Felt Washer
Idler Drive Sheave
Idler Drive Belt
Speed Control Shaft Assy.
8-32 x l,/4Bristol Head Set
Screw
#6-32 x 3rr16Phiilips BHMS
#6-32 x 7/8 Phillips BHMS
#8-32 x 1/4 Bristol Hd. Set
Screw
Push Button Assy.
Drive Mounting Plate Assy.
Internal Lockwasher
120
t2l
L22
tr2
113
Lt4
115
116
11?
118
119
123
t24
t25
126
127
128
r29
130
131
t32
133
134
135
136
138
139
140
L4l
L42
143
r44
L45
146
r47
148
149
150
151
t52
154
155
156
157
158
159
160
161
L62
163
51 -2t02-3
B-28-159
B-19-840E
B-23. 163
c -13. 257-1C
B-28.163
B-32.297B
73-223r-5
57 -2102-3
B-19.862C
c-19. 83?F
?3-2231 -5
57-2t02-3
B-33- 411^A
73-223L-5
48-409-1
D-36. 153E
D-36. 154c
B-33.418
13-224t-L43
73-2254-3
c-19. 88?A
73-2254-3
73-2241-t43
33. 415
35. 834
9?-3062
B-31.335A
5?. 3683-1
B-33.409
B-28. 163
B-33.408C
B-28. 163
B-31. 32?D
B-32.288D
57-2t02-3
'13-2231-5
73-224L-t43
tto-47
B-32. 291
B-31.3244'
'',t -2109-2
B-19.961
B-33.40?-1
51-3182
57-2L09-2
B-31. 324A
B-32.264F
B-35. 768A
5?-3589-1
#8-32 x 1/4 RHMS
Shock Mount
Steady Bracket
Linen Washer
Flywheel
Linen Washer
Brake Drum Shaft
Erase Head Forward Adjustment
Screw
Internal Lockwasher
#8-32 x 1/4 RHMS
Angle Bracket for Mounting
Drive Assy.
Motor Adapter Plate
#8 Int- Lockwasher
#8-32 x 1/4 RIIMS
Flat Washer
#8 Internal Lockwasher
8-32 x 5/16 Hex. Nut
Motor, Round Type( Fasco) Motor,
Square Type(GI and Alliance)
Truearc Retaining"E" Ring
Flat Washer
Felt Washer
Fan Blade
Felt Washer
Flat Washer
Push-On Fastener
Idler Lever Assy.
Brake Spring
Brake Pad, Felt
8-32 x 1/4Undercut Flat Head
Ilairpin Clip
Linen Washer
Rubber Bonded Idler Wheel,
2 t/2,, Dia.
Linen Washer
Idler Lift Compression Spring
Motor Pulley
#8-32 x 1/4 RHMS
#8 Internal Lockwasher
Flat Washer
Idler-Throw-Out Lever
Shoulder Washer
Idler Spring (Tension)
#6-32 x 3/l6Phillips BHMS
Speed Control Shaft Detent
Spring
ttC" Washer
Shift Plate for High Speed
#6 -32-3/ 16 Phillips BHMS
Idler Spring (Tension)
Idler Slide Bushing
Idler Slide Plate Assy.
#8-32 x 1/4 Bristol Hd. Set
Screw
Page 12