• Country
• Czechoslovakia

• Manufacturer / Brand
• REL, Electrum; Brno

• Year
• 1939 ??

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 245830

• Number of Tubes
• 3

• Valves / Tubes
• 4654 4654 AZ4

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 120; 220; 240 Volt

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

• Power out
• 25 W (undistorted)

• Material
• Metal case

• from Radiomuseum.org
• Model: Koncový zesilovač - Output amplifier K-25 - REL, Electrum; Brno

• Shape
• Chassis only or for «building in»

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

• Author
• Model page created by Gabriel Toth. See "Data change" for further contributors.

• Other Models

• Here you find 49 models, 28 with images and 33 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from REL, Electrum; Brno