• Country
• Czechoslovakia

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

• Year
• 1971

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 88928

• • Brand: Supraphon

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

• Number of Transistors
• 9

• Semiconductors

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz

• Tuned circuits
• 5 AM circuit(s)     7 FM circuit(s)

• Wave bands
• Broadcast, Long Wave, Short Wave plus FM or UHF.

• Power type and voltage
• Dry Batteries / 4 × 1,5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 10 cm = 3.9 inch

• Power out
• 0.5 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Madison 2828B - Tesla; Praha, Bratislava etc.

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

• Dimensions (WHD)
• 284 x 82.5 x 136 mm / 11.2 x 3.2 x 5.4 inch

• Notes
• Transistoren: 5× OC170, 107NU70, SC206 (KC508), GC521, GC511. UKW: OIRT-Bereich 66-73,5 MHz; Langwelle: nur 272 kHz (1102,9 m) Tschechoslowakischer Rundfunk.

• Net weight (2.2 lb = 1 kg)
• 1.1 kg / 2 lb 6.8 oz (2.423 lb)

• Price in first year of sale
• 1,130.00 Kčs

• Source of data
• Ceskoslovenske Rozhlasove a Televizni Prijimace a Nizkofrekvencni Zesilovace

• Mentioned in
• Tesla Výrobky spotřební elektroniky 73-74

• Author
• Model page created by Wolfgang Lill. See "Data change" for further contributors.

• Other Models

• Here you find 1835 models, 1152 with images and 661 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Tesla; Praha, Bratislava etc.