• Country
• United States of America (USA)

• Manufacturer / Brand
• RCA (RCA Victor Co. Inc.); New York (NY)

• Year
• 1939

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 53746

• • alternative name: RCA Manufacturing || Victor Talking Machine

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 7

• Valves / Tubes
• 6SK7 6SA7 6SK7 6SQ7 6U5 6F6G 5Y3G

• Main principle
• Superhet with RF-stage; ZF/IF 455 kHz

• Wave bands
• Broadcast, Long Wave and 2 x Short Wave.

• Power type and voltage
• Alternating Current supply (AC)

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 8 inch = 20.3 cm

• Power out
• 2.5 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 7Q4 Ch= RC-478A - RCA RCA Victor Co. Inc.; New

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 20.8 x 15.6 x 9.8 inch / 528 x 396 x 249 mm

• Notes
• This model has 3 power supply ratings:
  Rating A...105-125V, 50-60 Cycles
  Rating B...105-125V, 25-60 Cycles
  Rating C...105-130;140-160;200-250V, 40-60 Cycles
  

• Price in first year of sale
• 70.00 USD

• External source of data
• Ernst Erb

• Source of data
• Collector's Guide to Antique Radios 4. Edition

• Circuit diagram reference
• Rider's Perpetual, Volume 12 = ca. 1941 and before

• Mentioned in
• Guide to Old Radios

• Literature/Schematics (1)
• RCA Victor Service Notes "Red Book" Series

• Other Models

• Here you find 5131 models, 3234 with images and 4167 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from RCA (RCA Victor Co. Inc.); New York (NY)