• Country
• Czechoslovakia

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

• Year
• 1959–1961

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 74974

• • Brand: Supraphon

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

• Number of Tubes
• 6

• Valves / Tubes
• ECH81 ECH81 EABC80 EL84 EM80 EZ81

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

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast, Long Wave and 2 x Short Wave.

• Power type and voltage
• Alternating Current supply (AC) / 125/220 Volt

• Loudspeaker
• 2 Loudspeakers / Ø 10 cm = 3.9 inch

• Power out
• 2.5 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Rondo II 528A - Tesla; Praha, Bratislava etc.

• Shape
• Tablemodel with Push Buttons.

• Notes
• The second loudspeaker: 20x15cm elliptical. Variants 528A-2, 528A-5 and 528A-7 with different tuning scales.

• Mentioned in
• Ceskoslovenske Rozhlasove a Televizni Prijimace I a II

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

• Other Models

• Here you find 1874 models, 1197 with images and 680 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Tesla; Praha, Bratislava etc.