Butoba MT5 User manual

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GENERAL INFORMATION
The Butoba Model MT-5 is a battery-operated, dual-speed, dual-track transistorized tape
recorder.
Supplied as opti.onal equiprnent is a converter unit which can be used on Uor 130, 150,
220, 240, or 260 volt AC, 50-60 cycles. AIso connections can be made to a 6-volt car battery.
Recordings can be made from a radio, phonograph, television receiver, or telephone as
well as those made directly from a microphone.
Tape speeds are L 7 / I and' 3 3/ 4 ips. The playing or recording times, using both tracks,
are as follows:
Reel Size
5" (600 ft.) 1 r/blps
2 hous 3 3/4 ips
I hour
Motor Power Supply - Four - 1. Batteries
Amplilier Power Supply - Four - f.5V 'D" Ce1l Batteries
Supplied By:
Stanford lnternalional
1227 Laurel Street
San Carlos, California
HC'WARD W. SA|US &
The listing of any available replacement part herein does
not constltute in any case a recommendation, warranty or
guarantyby Howard W. Sams & Co., Inc., as to the quaiity
and suitability of such replacement part. The numbers of
these parts have been compiled from informetion furnished
to Howard W. Sams & Co., Inc., by the manufacturers of
cQ479
C O.t I Il G. Indianapolls €i, lndiana
the particular type of replacement part listed. Repro-
duction or use, vithout express permission' of editorial or
pictorial content, in any mamer' i8 prohibited. No patent
liability i8 assumed with re8pect to the use of the informa-
tion contained herein. O 1962 Howard w. sams & Co. , Inc. ,
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Indianapolis 6, Indiana.
DAII 2 -62 Printed in U.S. of Amerlca
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Stop Key, Symbol "0"
When depressed, stops the tape motion and
siruts off the amplifier. Before operating a new key,
the stop key should always be depressed first.
Recording Key, Symbol .Q-
When depressed, puts the recorder in the re-
cord mode-
Playback Key, Symnot ffl
When depressed, puts the recorder in the play-
back mode.
N0Tt: With the Recording key and Playback
key depressed simultaneously, the record-
er may be used as a public address system.
Fast Forward Key, Symbol --->
When depressed, moves the tape at a rapid rate
onto the take-up spindle.
Fast Rewind Key, Symbol <-
When depressed, rewinds the tapeon the rewind
spindle.
Start-Stop Lever
After the Playback key or Record key is de-
pressed, the Start-Stop lever must be moved to the
left to put the tape in motion. This is also a pause or
quick stop controll moving further tothe left will stop
the tape momentarily.
Volume Control
Turning control clockwise will inerease volume
OPERATING
Threading the Tape
l. Placea reel oftape on theleft hand reelspindle.
2. Plaee anempty reel onthe right hand reel spin-
dle.
3. Unwind about 12" of tape from the supply reel.
4. Insert the free end of the tape into one of the
radial slots inthe right hand spindle reel. Turn
the reel several turns counterclockwise to se-
cure the tape to the reel and take up all slack
between reels.
Microphone Recording
1. Rotate the volume clockwise.
2. Insert the microphone plug in the socket on the
left side of the recorder.
3. Set the speed tot 3 3/ 4 or I ?/ 8 ips.
4. Push the Record(O) key down and shiftthe Stop-
Start lever to the Ieft to put tape in motion.
Page 2
FUNCTION OF CONTROLS AND JACKS
during playback. When recording, it controls the re-
eordi,ng level.
Tone Control
Turn this control elockwise to increase the
treble.
Speed Selector
To select the desired speed, move the lever to
the left f.ot 3 3/ 4 ips (9. 5 cm ps) or to the right for
L 7/ I ips (4. ?5 cm ps).
NOTE: When recorder is not in use, the speed
selector should be set for I ?/ 8 ips.
Tape Counter Clock
When starting a new recording, set the tape
clock to 12 o'clock. Logging the tape at different
points makes it easy to locate any given part of a
recording.
High I mpedance lnput-Output Receplacle
This receptacle is located on the right side of
the recorder and can be used for recording from a
radio, TV, or phonograph, and for connecting an ex-
ternal speaker or amplifier system.
Low I mpedance I nput-Output Receptacle
This receptacle is located onthe left side of the
recorder and can be used for recording from micro-
phone, telephone adapter, and monitoring the record-
ing by earphone.
I NSTRUCTI ONS
5. Hold the microphone about 6 to 12 inches from
your mouth and speak in a normal voice.
6. Adjust the volume control so thatline and magic
eyeindicator doesnot fade out onloud passages,
but will flicker on soft passages.
Recording from Radio or Television Receiver
Insert plug end of the cable into plug located on
the right side of recorder. Connect other end of cable
to radio or television receiver.
Follow steps 3 through 6 in 'B.ecording from
Microphone".
Dual-Track Recording
This recorder is designed to record and play
back one-half the width of the tape at a timel thereby,
resulting in a two-track recording. After the first
recording is completed, remove the full reel fromthe
right-hand spindle; turn the reel over and place it on
the left-hand spindle. Then make another reeording.
The tape can be played back in the same manner.

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FIG.I TOP VIEW OF MECHANISM
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To Erase a Recording
In the Record position, any recording on the
tape is automatically erased before a new recording
is made. Should it be desired to erase a recordj"ng
without recording new material, follow the normal
recording procedure, but set the volume control fully
cloekwise.
To EdiI and Splice Tape
N0TE: It is impossible to edit and splice one
track without affecting the other. Record-
DISASSEMBLY
To Remove Recorder from Case
I. Remove the battery holder or the converter by
loosening the large screrp in the center.
2. Rernove the plastic lid from the top of cabinet.
3. Remove two screws. Remove the Pushbutton
eseutcheon (?).
4. Remove two screws (5). Remove head cover
(6).
5. Remove tape counter knob (ll).
l.
I NSTRUCTI ONS
6. Loosen set screw on
move knob (2).
7. Remove four screws
0).
ings to be edited should be limited to one
track.
Tape may be edited by cutting outunwanted por-
tions, or by joining selections into another se-
quence. Announcements canbe inserted between
selections, etc. Unused tape can be spliced for
re-use.
For best results, cut tape at a slight diagonal,
butt ends together and fasten on the glossy side
with splicing tape. Trim off any excessive
width.
2.
speed seleetor (3). Re-
(4) from top dress plate
8. Remove top dress plate (l).
9. Remove 4 wood screws from recorder. Lift
recorder straightup until it clears the top, then
unsolder speaker leads.
10. To reassemble, reverse the loregoing proced-
ure.
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FIG. 2 BOTTOM VIEW OF MECHANISM WITH FLYWHEEL REMOVED.
ADJUSTMENTS
Motor Speed
The speed regulator serewis accessiblethrough
the cut-out section in the motor case and the opening
of the regulator cap. To inerease speed, turn regu-
lator screwclockwise. Todecrease speed, turn serew
counterclockwi se.
Tape Tension
There should be a certain amountof drag on the
supply reel, to keep tension on the tape. If tape jerks
while playing a recording, turn adjusting screw (?lA)
until proper tension is obtained.
Head Alignment
l. Remove the pressure lever (5I).
2. Thread a tape onto the recorder.
3. Adjust screws (43) until the ferrite edge of the
erase head (42) is flush with the top edge of the
tape. Adjust screws (43) until the pole piece on
the record-playback head (41) is flush with the
top edge of the tape.
4. If the pole piece of the record-playbaek head is
not vertical, it may be adjusted by threading a
5,000-cycle note tape onto the recorder.
5. Place the recorder in the playback mode. Set
volume to the center of its range.
6. Adjust the screws, located on each side of
record-playback head (41) for maximum sound.
The two brakes(l8and 3b)are released whenthe
recorder i.s in the record or playback mode. ff the
brakes failto release, adjust the screws onthe brakes
until proper clearance is obtained.
CLEAN I NG
The record head, erase head, capstan, pressure
roller, and tape guides should becleaned oceasionally
to remove the tape residue which is worn off the tape
as it passes these parts. Use a soft cloth and alcohol
to remove residue.
Page 4
Clean the rubber tired spindles and belts with
cleaning fluid.
CAUTI0N: Never clean the magnetic heads with
tetrachloride.

FIG.3 BOTTOM VIEW OF MECHANISM
LUBRICATION
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Lubrication should not be required for a long
period of time. If the, recorder is disassembled for
repair, appiya thincoat ofgreaseon the sliding levers
and a drop of oil on the bearings of the spindles
capstan shaft bearings.
TROUBLE CHART
Symptom Cause Remedy
Pushbuttons will not stay in
when depressed or jump out
at the slightest movement.
l. Notches of key assembly worn. 1. Replace key assembly.
No rewind, but motor runs. l. Broken or diseonnected
(3?). sprmg 1. Replace or connect spring (37).
No fast forward but motor
runs. l. Broken or disconnected spring
(3?A). l. Replace or connect spring (3?A).
No takeup in play or record
position. I. Take-up spring belt (14) broken. l. Replace take-up spring belt (14).
Capstan pressure plate fails
to engage after start-stop
lever is moved.
I. Broken or disconnected spring
(6r). l. Replace or connect spring (6i).
No erase. 1.
2.
1.
2. Erase head (42) defective.
Erase head (42) positioned
wrong.
Replace erase head (42).
Position erase head (42) so it is
parallel withthe tape when inthe
record position.
No record or playback. J. Play-record head(41) defective.
Page 5
I. Replace play-record head (4f). TT
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PAGE 14

MECHANICAL PARTS LIST
I
2
3
4
5
6
t
8
I
l0
1l
L2
r3
t4
t5
16
L7
18
l9
20
2L
22
23
24
25
26
21
28
29
30
31
32
33
34
35
36
37
37A
38
39
40
4L
42
43
Cover Plate for Tape Deck
Speed Control Knob
Set Screw
Screw, Cover Plate
Screw, Head Cover
Head Cover
Cover Plate for Pushbuttons
Tone and Volume Control Knobs
Set Screw
Nut
Tape Counter Knob
Screw
Reel Clips
Take-up Spring Belt
Take-up Spindle
'E" Ring
Spring
Brake Lever, Rlght
Spring
Reverse and Fast Forward Lever
tE" Ring
Take-up Drive Pulley
Set Screw
Capstan and ShaIt
Tape Guide (Right Side)
Washer
BaII Bearing Assembly
Pressure Roller
Tape Guide (Small)
Spacer
Capstan Pressure Plate
Speed Control Tension Spring
Tape Deck
Rewind Spindle
Brake Lever, Left
Tape Counter Belt
Rewind Spring
Take-up Spring
Guide Screw for Stoprail
Stoprail
Guide Screw for ftoprail
Record Head
Erase Head
Screw
44
45
46
47
48
49
50
5i
52
53
54
55
56
57
58
59
60
6l
62
63
64
65
66
6?
68
69
?0
7T
7tA
72
73
74
?5
?6
77
?8
?9
80
8i
82
83
84
85
86
Head Mounting Plate
Spring
Tape Guide (Left Side)
"Et'Ring
Start Lever
Start Lever Spring
Tape Release
Pressure Lever Pad Assembly
Screw
Spring
Eye Tube Holder
Tape Counter Clock
Set Screw
Counter Pulley Bracket
Pushbutton Assembly
Counter Pulley
Rubber Spaeer
Spring
Motor Mounting Plate
Motor Bracket
Spring
Guide Tube for Capstan Sraft
Speed Switching Cam
Speed Switching Lever
Tape Drive Motor
Flywheel
Supply ReeI Brake
Screw
Pushbutton Lever Shaft
Rewind Lever
Stop Lever
Forward Lever
Speed Control Lever Shaft
Motor Bracket
Screw
Set Screw
Screw
Forward-Rewind Motor Bracket
Screw
Forward-Rewind Motor
Rubber Sleeve
Rubber Grommet
Set Screw
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