Turntable Details
Drive
Direct
Motor
AC
Wow & Flutter %
0.25
Rumble [dB]
Speed
33, 78
Dimensions [mm]
Platter Material
Platter Diameter [mm]
406.0
Total Weight [kg]
Tonearm
Year Built
68.00
Straight
Platter Weight [kg]
Plinth Material
Price
Additional information
Key Features:
Turntable Size: The turntable has a diameter of 16 inches, suitable for playing standard transcription records.
Drive System: The drive system is typically robust, though specific details about the motor configuration are not widely documented.
Speeds: It supports two speeds: 33 1/3 rpm and 78 rpm, accommodating both transcription records and older 78 rpm records.
Power Supply: Requires a power supply of 105 to 125 volts at 60 cycles (or 50 cycles for international models), consuming about 35 watts.
Technical Specifications:
Platter Material: The platter is typically made of a durable material, often with a felt covering to facilitate smooth record handling.
Pickup Arm: Often used with a sturdy pickup arm equipped with a magnetic cartridge, requiring periodic stylus replacement.
Equalization: Features a passive equalizer unit with multiple playback curves for different types of records, including lateral and vertical cuts.
Restoration and Maintenance:
Service Manual: Available service manuals provide detailed schematics and repair information for electronics experts.
Community Support: Online forums offer valuable insights and support from experienced users, aiding in restoration and troubleshooting.
Historical Context:
Broadcast Use: Widely used in radio stations for playing transcriptions and commercial records, the RCA 70-D was a standard in the industry.
Evolution: As technology evolved, turntables like the RCA 70-D were eventually replaced by digital systems in radio broadcasting