• Country
• United States of America (USA)

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

• Year
• 1937 ?

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 172449

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

• Number of Tubes
• 4

• Valves / Tubes
• 845 845 866 866

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 105-125 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Power out
• 40 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: Power Amplifier MI-4255-B - RCA RCA Victor Co. Inc.; New

• Shape
• Chassis only or for «building in»

• Dimensions (WHD)
• 17.31 x 12.25 x 17 inch / 440 x 311 x 432 mm

• Notes
• Theater Power Amp; part of Amplifier Rack RCA MI-1236-B.

• Net weight (2.2 lb = 1 kg)
• 110 lb (110 lb 0 oz) / 49.940 kg

• Mentioned in
• -- Original-techn. papers.

• Author
• Model page created by Gottfried Silberhorn. See "Data change" for further contributors.

• 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)