Akai M 8 Service Manual

Page 1

55mm mnmsm

THE QUALITY OF

THIS MANUAL IS

THE BEST THAT
IS AVAlLABLE

For Service Manuals Contact
MAURITRON TECHNICAL SERVICES
8 Cherry Tree Rd. Chinnor
Oxon OX9 4QY
Tel:- 01844-351694 Faxr- 01mm
Email:- smuiries®maurimnm|k

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MODEL NUMBER :

WEIGHT lNET

lN CARTON):

DIMENSIONS

POWER

REQUIREMENTS :

POWER

CONSUMPTION :

RECORDING

SYSTEM :

PLAYBACK

SYSTEM :

TAPE SPEED

TAPE SPEED

DEVIATION :

WOW AND

FLUTTER :

PAS) tUnVV.'.RD
AND REWIND

TIME :

FREQUENCY

RESPONSE :

DISTORTION

SIGNAL-TO-

NOISE RATIO:

CROSS TALK

Akai Model MB, portable 4-tmc:

stereo tape recorder.

47.3 lbs.
2.4 lbs.
supplied.
20H;-;13"W.«9'D, overall, case clo-
sed. (510H2~340W >1226D in m/mi

(2115 kg.) for MS
[1.1 kg.) for all accessories

AC. 100, 110, 170, 200, 220, or
240 volis interchangeable. 50-60

cycles.
1 00 V A.

Specific "cross-field" recording based
on the theory 01 trailless recording
bias system. Inline 4 irack stereo

and 4-track monaural recording.

Inline 4~irack stereo, monaural play
back.

Three speeds; 712' l19cm.). 3534'
l9,5 cm.) and 1-7/3' [4.75 cm.) per
second. <15" seccnd wi-h an acces-
sory capstan and pinch wheel.)

Less ihan :3 per cent at all inpe

speeds.

Less than 0.15); at 7-Vg ips. EMS.
Less than 0.25% at 3-%ips. R.M.S.
Less than 0.35% at 1~%ips. HMS.

90 seconds for 1,200It. tape 5150
cycles and 75 seconds at '30 cycles.

30 to 25,000cps. at 7-) ins;

:3 db. 40 to 21,000 cps. at 7-111; ips,
:3 db. 40 lo 18,000 cpsl at 3-44 ips;
:4db.40 to 10,000 cps. at 1-% ips.
Within 2% at 1,000 cps, OVU Imtal

harmonic:

40 db below recorded level signal
at all speeds,

Within 53 db belween each track,

CHANNEL

SEPAR; TICN:

POWER INPUT

LEVELS :

POWER

OUTPUT :

INSULATION

RESISTANCE :

INSULATION
YIELD

STRENGTH :

MONITORING

~ w u
SYSI 'Au:

MOTOR

HEADS

MICROPHONE

USED :

SPEAKER

INCLUDED:

TUBES USED

HEELS USED
RECORDING
LEVEL

INDICATOR :

Better than 80 db at 1,000 ch-i 3 VU.

Microphone input level

-55 db lVR. max} at 1,000 cps.
Phono and radio input level
-15 db IVRI max; at 1.000 cps.

Head output, 1 mvi at 1,000 cps.
Ere-Amplifier output, 0.8 V at 1,000
cps, impedance 10,000 ohms

Main ouirvit. 34 dbni. up

(in 600 ohms).

s

More than 10 MEG ohms

More than one minute at AC.

'1,ooov with Headphone

With headphone (8 ohms during recordin
Hysteresis synchronous, two-speed
motor, dynamically balanced.

1/100 HP. Power ratio, 70 per cent.

. 3,000 to 1,500 rpm. at 50 cps,

3.600 to 1,800 rpm. at 60 cps.

: Inline four-track siereo/monaural re-

cord-play head;

T..- aaaaaaa l nflfl akw- a» '1 Ann ,wm
uupuuuuuu.uv,vvu minis E. New We.
Four-track, cross-field bias head;
Impedance..414,000 ohms at 60 kc.
Four-track erase heed'
Impedance...18 000 ohms at 60 lrc.

Square-shaped, dynamic microphone
Impedance. ..50,000 ohms
Sensitivity...--55 db.

Frequency Response...70 to 15,000
cps :10 db.

Two 4-inch dynamic speakers for

vertical stereo sound elleci
Impedancema ohms
Allowable Inpui,..6 walls
Frequency Response...80 to
12,000 cps, 2-10 db.

6267 iEFSSi <2, 12AD7 i12AX'lv:u2,

GBQS - 2, 6X4. 2, BARS 1.

Up to 7 reel

Ilurnoniui, Remodel VII melei