• Country
• Czechoslovakia

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

• Year
• 1956 ??

• Category
• Sound/Video Recorder and/or Player

• Radiomuseum.org ID
• 215484

• • Brand: Supraphon

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

• Number of Tubes
• 5

• Valves / Tubes
• EF86 ECC83 ECL82 EZ80 EM81

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Details
• Tape Recorder

• Power type and voltage
• Alternating Current supply (AC) / 110; 120; 150; 200; 220; 240 Volt

• Loudspeaker
• Permanent or electro-dynamic (moving coil), system not known yet.

• Power out
• 1.5 W (unknown quality)

• Material
• Various materials

• from Radiomuseum.org
• Model: Sonet Duo - Tesla; Praha, Bratislava etc.

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 348 x 185 x 287 mm / 13.7 x 7.3 x 11.3 inch

• Notes
• Tape speed: 9.53cm/s, 4.76cm/s
  Number of tracks: 2
  Max reel size: 127mm
  Premagnetisation current frequency: 50kHz
  Audio properties 50-10000Hz at 9.53cm/s 80-5000Hz at 4.76cm/s
  Tape fluctuation: +-0.4% at 9.53cm/s and +-0.6% at 4.76cm/s
  Microphone input sensibility: 3.2mV /1Mohm
  Radio: 3.2mV / 20Kohm Pickup: 100mV / 1Mohm
  The wight is with include accesories (12.5kg)

• Net weight (2.2 lb = 1 kg)
• 12.5 kg / 27 lb 8.5 oz (27.533 lb)

• Literature/Schematics (1)
• -- Original prospect or advert (Scheme de Televizoare Magnetofoane, Picupuri Ed.2 1976)

• Author
• Model page created by Adalbert Blenessy. See "Data change" for further contributors.

• Other Models

• Here you find 1860 models, 1185 with images and 673 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Tesla; Praha, Bratislava etc.