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GENERAL INFORMATION
The Gemark Model l0l tape recorder is a two-speed tape recorder designed to play and
record two iracks of material on standard-width recording tape.
Recordings may be made from a phonograph, radio, or television receiver as well as
those rnade from the microphone.
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Reel Size
5" (600 ft. )
HOWARD lfl. SAms &
The liating of any available replacement part herein does
not constitute in any case a recommendation, warranty or
guarantyby Howard W. Sams & Co., Inc., as to the quality
and suitability of such replacement part. The numbers oi
these parts have been compiled from lnformation lurnished
to Howard W. Same & Co., Inc., by the manufacturers of
cQ459
Thetwo tape speeds are? l/ 2 and 3 3/4 ips. Using both tracks, the
times are as follows: recording andplaying
? l,/ 2" Speed
I/ 2 hour
the particular type of replacement part listed. Repro-
duction or use, without express permission, of edltorial or
pictorial content, in any manner, ls prohibited. No patent
liabillty is aseumed vith reepect to the use of the informa-
tioncontainedherein. @ tS6t HowardW. Sams & Co., Inc.,
3 3/4" Speed
I hour
This recorder is designed to operate on 60 cycles, lI0-120 volts, AC supply only.
lilanufactured By:
General Magnetics & Electronics, lnc.
134-09 36th Road
Flushing 54, New york
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DfiTE 3 - $I
Printed in U.S. of Amerlca
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GEMARK
MODET IOI
t0L0tR

0n-0ff Volume
Turn thiscontrol clockwise toturn the power on
to the unit. Further rotation increases the volume on
playback and the recording level on record.
Function
This control selectsthe differentmodes of oper-
ation. Turning this control clockwise from the Stop
position places the unit in the Playback mode. To
place the unit in the Record mode, depress the Func-
tion control and turn it clockwise until it locks into
position.
FUNCTION OF CONTROLS
OPERATI NG I N STRUCTI ONS
Wind-Rewind
Move this control to the right to wind the tape
onto the takeup reel and to the left to rewind the tape
onto the supply reel. Before operating this control,
make sure the Function control is in the Stop position.
Speed Change
To change the recorder speed to 3 3,/ 4 ips, pull
up onthe control. Pushing downon the controlchanges
the speed to 7 L/ 2 ips.
NOTE: This control should be operated only
when the recorder is turned on.
Threading the Tape
l. Place a reel of tape on supply reel spindle (18).
2. Place an empty reel on takeup reel spindle (3).
3. Unwind about 12" of tape from the reel. HoId a
section taut and insert it into the tape slot.
Make surethe dull-coated side faces the rearof
the recorder.
4. Insert the free end of the tape into one of the
radial slots in the hub of the takeup reel. Turn
the reel several turns counterclockwise to se-
cure thetape to the reel and to take up all slack
between reels.
To Record f rom Microphone
l. Turn the unit on andallow sufficient time forthe
tubes to warm up.
2. Insert the microphoneinto the microphone jack.
3. Set tlte Speed Selector forthe desired reeording
speed.
4. Move the Function Control to the Record posi-
tion.
5. Place the microphone about 6 to 12 inches from
the signal source.
6. Adjust theVolume control until the record level
indicator flashes on the loudest peaks.
NOTE: Correct volume levelwhen recording is
very important. Too weak a signal will
result in weak playback and high baek-
ground noise. Too strong a signal will
result in distortion during playback.
To Record from a Radio
To record from a radio, one of the following
methods may be used:
l. Microphone Pickup from Radio SpeakeI. -
Place the microphone about 6 to 12 inches in
Page 2
front of the radi.o speaker. Turn the radio
volume control to a normal level. Turn the
radio tone control to treble or high. Set the
recording level and record as under "To Record
from a Microphone".
2. Direct Connection to Radio Speaker. -
Make a shielded cable with a two-eonductor
phono plug on one end and two alligator clips on
the other end. Connectthe alligator clips across
the voicecoil terminals ofthe radio speakerand
insert theplug intothe microphone jack. Set the
radio volume d,nd tone controls as described in
Step l. Set the recording level and proceed as
describedunder "To Recordfrom a Microphone".
3. DirectConnectionto Volume Controlof Radio. -
ne
end. Connect the other end across the radio
volume control. Insert the phono plug in the
microphone jack. Set the recording level and
reeord as described under "To Record from a
Microphone". The setting of the radio volume
and tone controls will have no effect on this
setup.
To Record from Phonograph
A phono plug is required on the pickup leads of
the phonograph. Insert itinto the microphone jackand
proceed as described under "To Record from a Mic-
rophone".
To Record from a Television Reieiver
Use one of the methods described under "Re-
cording from a Radio".
Dual Track Recording
This recorder is designed to record and play
on one-half the width of the tape at a timel thereby,
resulting in two-track recording. After the first re-
cording is completed, remove the full reel f rom the
takeup reel spindle (3), turn the reel over and place
it on the supply reel spindle (18). The second track
can now be recorded. The tape can be played back in
the same manner,

FIG.I TOP VIEW OF MECHANISM WITH DRESS PLATE REMOVTD
RgWind beforeanewrecordingis madewith the unitin Record.
Should it be desired to erase a recording without re,
To rewind the tape at a rapid speed, move the cording new material, follow the normal recording
Wi.nd-Rewind control to the left, holding it in this po- procedure but set the Volume control fully counter-
sition until the tape is rewound. clockwise and leave the microphone disconnected.
Fast Forward To Edit and Splice Tape
Towind the tapeforward at a rapid speed, move N0TE: It is impossible to edit and splice one
theWind-Rewind control to the right, holding itin this track of a two-track recording without
po-sition until the tape is wound to the desired place. affectingthe other. Recordings to be edited
should be limited to one-track recordings
To Play a Recording only.
l. Thread the tape as described under "Threading l. Tape maybe edited by cutting outunwanted por-
the Tape". tions or by joining selections into another se-
quence. Announcements can be inserted between
2. Turn the Function Selector to the Play position. selections, etc. Unused tape can be spliced for
3. Adjust theVolume control to the desired listen- reuse'
ing level. 2. For best results, cut tape at a slight diagonal,
butt ends together and fasten on the glossy side
TO EfaSe a ReCOfding with splicing tape. Trim off any excess width.
Any recording on the tape is automatically erased
CLEAN ING
The tape guides, erase head, record-playback with a soft, Iint-free clothdipped in alcohol toremove
head, pressure roller, and capstan should be cleaned tape residue from these parts.
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D I SASSEMBLY
To Remove Recorder from the Case To Remove Amplifier from Tape Transport
l. Remove Function control (9), On-Off Volume l. Remove the bracket holding the record level
(2?), and Tone control (28) knobs. indicator'
2. Remove reel spindle covers (l). 2. Disconnect the motor leads'
l. Remove two screws from escutcheon (ll) and 3. Disconnectthe record-playbackhead wiresfrom
remove escutcheon. the printed board'
4. Remove Speed Selector knob (t9). 4. Loosen set screw holding lever to switch on
Printed board.
5, Remove trvo screws from head cover plate (8)
and four ."""*" i"orrtih" dr""r plate (?). 5. Disconnect line cord from on-off switch'
6. Remove four screws, two fromeaeh endof case. 6. Remove power transformer f rom motor mount-
ing plate (88).
?. Lift the unit up and away from the case and re-
move the rorr" nuis iroiding tfre speaker to the ?. Remove three screws holding printed board to
case. chassis brackets'
8. Lilt entire unit from case. 8' Reverse the above procedure to reassemble'
9. Reverse above procedure to reassemble.
TROU BLE CHART
SymPtom Cause Rt*tdY-
No Record or Playback l. Drive ben (42) or (62) off or I. Replace drive belt.
broken.
2. Tensionspring(31)disconnected 2. Replace tension spring'
or broken.
3. Defective record-playbackhead 3. Replace head.
(24).
4. Defective motor (91). 4. Replace motor.
No Rewind l. Rewind idler(?8) loose onshaJt. I. Tighten set screw on idler'
2. Actuating spring (?5) bent or 2. Straighten or replace spring'
broken.
3. Spring (?6) unhooked or broken. 3. Replace spring.
No Erase l. Erase head(80) turned on shaJt. l. Straighten erase head.
2. Slide Iever (84) unhooked from 2. Connect slide lever'
switch operating slide (85).
Reel Spindles sliP l. Grease on drive wheels. 1. Clean drive wheels.
MECHANICAL PARTS LIST
Ref .
No. Description Ref.
No. Descriptton
I
2
3
4
5
6
7
I
Reel Spindle Cover
ReeI Hold Down
Takeup Reel Spindle
Felt Washer
Clutch
Screw
Dress Plate
Head Cover Plate
9
l0
ll
L2
l3
L4
l5
tb
Function Control Knob
Screw
Escutcheon
Trim Strip
Wind-Rewind Knob
Pressure Roller
Screw
Tape Guide
Page 4

FIG.2 BOTTOM VIIW
MECHAN ICAL PARTS
OF MECHAN I SM
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Description Description
L7
l8
I9
2A
2L
22
23
24
25
26
27
2B
29
30
31
32
33
34
35
36
37
3B
39
40
4l
42*
43
44
45
46
47
4B
49
50
5l
52
53
54
55
56
57
58
Head Mounting Plate
Supply Reel Spindte
Speed Selector Knob
Screw
Jewel
Hairpin Clip
Washer
Record-P1ayback Head
Pressure Pad Assembly
Tape Guide
On-Off Volume Knob
Tone Knob
Screw
Tape Guide
Spring
Part of Item 25
Head Mounting Nut
Screw
Bracket
Spring
Takeup Reel Mounting Plate
Speed Nut
Takeup Idler Wheel
Hairpin Clip
Pulley
*Takeup Drive Belt
Takeup Drive Idler Bracket
Spring
Pressure Roller Actuating Lever
Spring
Brake Operating Lever
Function Control
Spring
Motor Board Assembly
Screw
Speed Shift Clip
Mounting Bracket
Rewind Idler
Washer
Set Screw
Rewind ldler Mounting Bracket
Brake Plate
59
60
61
62*
63
64
65
66
6?
6B
69
?0
7L
72
?3
74
75
76
77
?8
79
BO
BI
82
B3
B4
85
B6
B7
B8
B9
90
91
92
93
94
95
96
97
98
99
r00
Brake Shoe
Brake Shoe C ap
Connecting Link
*Flywheel Drive Belt
Part of Item 45
Bushing
Wind-Rewind Slide
Wi.nd-Rewind Slide Actuating Lever
Wind-Rewind Control
Speed Shift Plunger
7 L/ 2 ips BeIt Shifter
Compression Spring
3 3/ 4 ips Belt Shifter
Speed Nut
Spring
Supply Reel Spindle Mounting Plate
Actuating Spring
Spring
Bushing
Rewind Idler
Flywheel and Capstan Assembly
E rase Head
Grip Ring
Fish Paper Insulation
Support Plate
Switch Operating Slide Lever
Switch Operating Slide
Switch Operating Slide Stop
Screw
Motor Mounting Plate
Grommet
Spacer
Motor
Bushing
E rase Head Mounting Shaft
Printed Circuit Mounting Bracket
Shock Mount
Washer
Screw
Tension Spring
Set Screw
Fan
* Takeup Drive Belt-
WALSCO Part #1410-12. * Flywheel Drive Belt ,
WALSCO Part #1410-15.
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A PHOTOFACT 'EXPLODED' VIEW
@Flowud W. Samr & Co.,lnc. l96l
FIG.3A EXPLODED VIEW OF PARTS ABOVT HEAD MOUNTING PLATE
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A PHOTOFACT'EXPLODED' VIEW
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FIG.3B EXPLODED VIEW OF PARTS ABOVE MOTOR BOARD
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A PHOTOFACT 'EXPLODED' VIEW
@Howud W.Srmc & Co.,lnc. 196l
FIG.3C EXPLODED VIEW OF PARTS BELOW MOTOR BOARD
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