• Country
• Czechoslovakia

• Manufacturer / Brand
• Tesla; Praha, Bratislava etc.

• Year
• 1954

• Category
• Military Transceiver (TRX)

• Radiomuseum.org ID
• 311776

• • Brand: Supraphon

• Number of Tubes
• 8

• Valves / Tubes
• 1F34 1H34 1F34 1F34 1F34 1F34 1F34 1F34

• Main principle
• Superhet with RF-stage; ZF/IF 452 kHz

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Storage and/or dry batteries / 90 & 1,2 Volt

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Marathon R3 - Tesla; Praha, Bratislava etc.

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 120 x 390 x 340 mm / 4.7 x 15.4 x 13.4 inch

• Notes

• Frequency range 160-330 kHz, 480 kHz-7 MHz in 4 subbands.

• Net weight (2.2 lb = 1 kg)
• 15 kg / 33 lb 0.6 oz (33.04 lb)

• Mentioned in
• -- Original-techn. papers. (State District Archive Hradec Králové)

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

• Other Models

• Here you find 1874 models, 1199 with images and 681 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Tesla; Praha, Bratislava etc.