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TranscriptionTurntable 12D/4

TranscriptionTurntable 12D/4; Commonwealth (ID = 2348697) R-Player TranscriptionTurntable 12D/4; Commonwealth (ID = 2348698) R-Player
TranscriptionTurntable 12D/4; Commonwealth (ID = 2348699) R-Player TranscriptionTurntable 12D/4; Commonwealth (ID = 2348700) R-Player
TranscriptionTurntable 12D/4; Commonwealth (ID = 2348701) R-Player
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TranscriptionTurntable 12D/4; Commonwealth (ID = 2348697) R-Player
Commonwealth: TranscriptionTurntable 12D/4 [R-Player] ID = 2348697 1400x954
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For model TranscriptionTurntable 12D/4, Commonwealth Electronics Pty. Ltd.; Hobart, TAS:
eBay advertisement by seller “johnmurt”, Item Number 261335315235. Please contact Radio Museum to provide more complete photo credit information or request removal.
Country:  Australia
Manufacturer / Brand:  Commonwealth Electronics Pty. Ltd.; Hobart, TAS
Year: 1959 Category: Sound/Video Recorder and/or Player
Semiconductors (the count is only for transistors) 2: OA210 OA210
Wave bands - without
Power type and voltage Alternating Current supply (AC) / 240 Volt
Loudspeaker - - No sound reproduction output.
Power out
from Model: TranscriptionTurntable 12D/4 - Commonwealth Electronics Pty.
Material Metal case
Shape Chassis only or for «building in»

The Commonwealth Electronics 12D was the most popular turntable the company produced.

It was the last model the company produced and following the takeover by Philips the 12D stayed in production till the 1970's. Two versions were available, the three speed 12D/3 and four speed 12D/4. On both models the idler wheel between the motor and the inside edge of the platter uses a solenoid to engage the idler wheel while the power is on. Therefor a flat should not develop if the speed is changed while the power is off.

Turntable diameter:       12in
Turntable weight:           6.5 lbs
Motor:                            4 pole, synchronous
Speeds:                         16.66, 33.33, 45.11, 77.93 RPM
Speed tolerance:           0% to +0.25%
Wow and flutter:             Less than 0.1% RMS total @ 33 RPM
Rumble:                         Better than -50db below recorded level of 7cm/sec at 1 kHz
Acceleration:                 1/2 rev @ 33.33 & 45 RPM, 3/4 rev @ 78 RPM

Collectors' prices  
Mentioned in - - Manufacturers Literature (Instructions Manual, Types 12D/3, 12D/4.)

Model page created by Gary Cowans. See "Data change" for further contributors.

All listed radios etc. from Commonwealth Electronics Pty. Ltd.; Hobart, TAS
Here you find 8 models, 8 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.