• Country
• Bulgaria

• Manufacturer / Brand
• Elprom KB (Kliment Voroshilov Works, Slabotokov zavod); Sofia

• Year
• 1951 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 227429

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) / 110; 150; 220 Volt

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

• Power out
• 2 W (undistorted)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Marek - Марек [I] - Elprom KB Kliment Voroshilov

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

• Notes

• Wave Bands:
  MW: 520-1600 kHz
  LW: 150-420 kHz
  SW: 5,8-18 MHz

• Mentioned in
• book "Bulgarian Radio Receivers"

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

• Other Models

• Here you find 66 models, 61 with images and 50 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Elprom KB (Kliment Voroshilov Works, Slabotokov zavod); Sofia