Radiola Balanced Amplifier Type AF

• Country
• United States of America (USA)

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

• Year
• 1924

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 54290

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

• Picture
• Schematics

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

• Number of Tubes
• 2

• Valves / Tubes
• WD11 WD11

• Power type and voltage
• Dry Batteries

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case, TUBES VISIBLE.

• from Radiomuseum.org
• Model: Radiola Balanced Amplifier Type AF - RCA RCA Victor Co. Inc.; New

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 140 x 150 x 170 mm / 5.5 x 5.9 x 6.7 inch

• Notes
• Battery setup:
  
  When the Radiola Balanced Amplifier is used with the Radiola III Receiver, a common "A"battery for both units is recommended. For lighting the filaments use five 1.5 Volt Dry Cells connected in parallel.
  Note: A two-volt storage battery may be used if desired.
  
  When the Radiola Balanced Amplifier is used with the Radiola III Receiver, a common "B"battery for both units is recommended.
  As the receiver uses 45 volts of "B" battery, and the Amplifier requires 90 volts of "B" battery, two additional 22.5 volt blocks (or one 45 volt block) will be required for the units when used in combination.
  
  For Grid bias one 4.5 volt Dry Cell is required as "C" battery.
  
  Push-pull output.
  The WD11 were often replaced by UX199, using adaptors. 60 mA from 3 V made only 0.18 W per UX199, while the WD11 drew 0.25 A from a 1.5 V battery = 0.375 W, practically twice as much. The price was the same: 6.50$.

• Price in first year of sale
• 30.00 $

• External source of data
• Ernst Erb

• Source of data
• Radio Collector`s Guide 1921-1932

• Mentioned in
• Radio Manufacturers of the 1920's, Vol. 3

• Literature/Schematics (1)
• - - Manufacturers Literature (Users Manual)

• Literature/Schematics (2)
• Adv. Radio Broadcast, May-Oct. 1924

• Other Models

• Here you find 5122 models, 3225 with images and 4156 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)