• Country
• Czechoslovakia

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

• Year
• 1949–1952

• Category
• Car Radio, perhaps also + sound player/recorder

• Radiomuseum.org ID
• 76407

• • Brand: Supraphon

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

• Number of Tubes
• 3

• Valves / Tubes
• ECH21 ECH21 EBL21

• Main principle
• Superheterodyne (common)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage Battery for all (e.g. for car radios and amateur radios) / 6/12 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 16 cm = 6.3 inch

• Power out
• 1.1 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: Omikron 503 BV - Tesla; Praha, Bratislava etc.

• Dimensions (WHD)
• 230 x 200 x 180 mm / 9.1 x 7.9 x 7.1 inch

• Notes
• Gerät kann mit 6 V 3,4 A oder 12 Volt 1,85 A betrieben werden.

• Net weight (2.2 lb = 1 kg)
• 4.2 kg / 9 lb 4 oz (9.251 lb)

• Price in first year of sale
• 9,500.00 Kcs

• Mentioned in
• Originalgerät

• Literature/Schematics (1)
• Ceskoslovenske Rozhlasove a Televizni Prijimace I a II

• Author
• Model page created by Hinrich Grensemann † 15.5.16. See "Data change" for further contributors.

• Other Models

• Here you find 1833 models, 1150 with images and 645 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Tesla; Praha, Bratislava etc.