MK204

• Country
• Czechoslovakia

• Manufacturer / Brand
• Microphona (Mikrofona), Bratri Knotkove, Praha-Strasnice

• Year
• 1934/1935

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 114558

• • alternative name: Telefony Microfona

• Picture
• Schematics

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

• Number of Tubes
• 3

• Valves / Tubes
• E424N C443 506

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown)

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Broadcast (MW) and Long Wave.

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

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 18 cm = 7.1 inch

• Material
• Wooden case

• from Radiomuseum.org
• Model: MK204 - Microphona Mikrofona, Bratri

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 450 x 240 x 200 mm / 17.7 x 9.4 x 7.9 inch

• Source of data
• - - Data from my own collection

• Author
• Model page created by Heinz Moser. See "Data change" for further contributors.

• Other Models

• Here you find 69 models, 52 with images and 45 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Microphona (Mikrofona), Bratri Knotkove, Praha-Strasnice