• Country
• Czechoslovakia

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

• Year
• 1988–1990

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 110729

• • Brand: Supraphon

• Number of Transistors
• Semiconductors present.

• Semiconductors

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

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

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

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

• Power out
• 2 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Progresson 447 A - Tesla; Praha, Bratislava etc.

• Shape
• Tablemodel with Push Buttons.

• Dimensions (WHD)
• 420 x 110 x 110 mm / 16.5 x 4.3 x 4.3 inch

• Notes
• UKW: OIRT 66···76 MHz und CCIR 88···108 MHz; UKW-Eingang mit Fet-Transistor, keramische Filter, LED für Abstimmungsanzeige; Anschlüsse für 2. Lautsprecher, TA/TB, Außenantennen. Das letzte Original TESLA-Radio.

• Net weight (2.2 lb = 1 kg)
• 2.2 kg / 4 lb 13.5 oz (4.846 lb)

• Source of data
• -- Collector info (Sammler)

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

• Other Models

• Here you find 1832 models, 1138 with images and 643 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Tesla; Praha, Bratislava etc.