Technics Catalogue 1978

Page 11

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SA-600

70 watts per channel, mlnlmum HMS, both channels
driven, at 5 ohms from 20-20,000 Hz. with no more
than 0.04% total harmonic distortion.
Pure-complementary OCL power amplifier with current
mirror loaded differential amplifier employing single-
packaged matched transistors, Twin 15,000,4F filter
capacitors in power supply. Phono SIN ratio 90 dB (IHF
A, re 10 mV). Bass and treble controls plus Acoustic
Control." 11 power-level LED's (5 per channel plus
display on" LED) with 2-step range selector, Dual-gate
MOS FET FM front end. Two flat group delay" lilters
in FM IF section. Quadrature detector. Phase locked
loop IC in FM MPX. Two-way tape dubbing. Two tuning
meters. Circuit-protection relay switch and pop-noise
muting. Main and remote speaker lacilities. Program
indicator. Simulated wood cabinet.

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1.

Turntables

'Ibchnics

Ultra-Low Speed, Direct-Drive Motor

Precise. quiet and rugged. Those words best describe Technics direct-
drive, instead of using a high-speed motor, with complicated speed
reduction mechanisms like idler wheels. belts and pulleys. the direct-drive
system uses a precise motor that rotates at exactly the same speed as
the platter, And with our integral rotor/platter stmcture, there is only one
moving part in the entire system. All this results in extremely low rumble.
wow and flutter, along with high reliability. Its little wonder that broadcast
stations and discos have used Technics directdrive turntables tor years.

Quartz Phase-Locked Servo Control

Our new SL-1301 and 1401 direct-drives use a quartz crystal for speed
control. The quartz results in almost non-existent speed drift (10,002%
maximum). What's more. three high~density IC's maintain this incredible
speed stability with up to 180 grams of load resistance, This provides
high starting torque and excellent handling of transient and constant
load conditions

B-FG Servo Speed Control

All the non-quartz direct-drives employ B-FG servo systems (back-
electromotivetorce frequency generator). This servo system constantly
monitors the platters movement, providing nearvinstantaneous correcting
current when any speed deviation is detected. As a result, platter rotation
is very stable, with superb load and transient characteristics. The system
is incomorated into a 321element lC chip.

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Multi-Disc F.G. Belt-Drive
SL-235

Frequency Generator DC servo belt-drive motor. Multi-
disc operation permits sequential play of up to six
records. Memo-Gram control programs record change
and/or repeats last record. in the singleplay mode. the
Memo»Gram control allows six repeated plays of a
record. or continuous play, F.G. servo system maintains
platter speed despite AC line fluctuations. Superb
specttications include: rumble ~70 dB DIN B, wow and
flutter 0.045% WRMS. 30.4 cm aluminum diecast platter.
Electronic speed change. Individual pitch (speed)
controls and illuminated stroboscope permit accurate
speed setting. Svshaped tonearm with low-friction
gimbal suspension. Oil-damped cueing in both
directions. Anti~skating control. Up-tront controls tor
start. stop. cueing. Memo-Gram and speed adjustment.
Detachable tonearm headshellHinged. removable dust
cover. Resonancedamping base material and audio

isolators tight feedback. 37