• Country
• Bulgaria

• Manufacturer / Brand
• Radioprom; Sofia

• Year
• 1947 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 223446

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

• Number of Tubes
• 4

• Valves / Tubes
• ECH21 ECH21 EBL21 AZ1

• Main principle
• Superheterodyne (common); ZF/IF 468 kHz

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

• Power type and voltage
• Alternating Current supply (AC) / 150/220 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Power out
• 2 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Hr. Botev - Хр. Ботев M 462 [AC, 4 Loktal tubes] - Radioprom; Sofia

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

• Author
• Model page created by Simeon Nikolov. See "Data change" for further contributors.

• Other Models

• Here you find 6 models, 5 with images and 4 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Radioprom; Sofia