• Country
• Czechoslovakia

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

• Year
• 9999/9999

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 23091

• • alternative name: Telefony Microfona

• Number of Tubes
• 3

• Valves / Tubes
• E446 E443H 506

• Main principle
• TRF with regeneration; 1 AF stage(s)

• Tuned circuits
• 1 AM circuit(s)

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

• Power type and voltage
• Alternating Current supply (AC) / 120-240 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Dublette zu ID=23092 - Microphona Mikrofona, Bratri

• Dimensions (WHD)
• 493 x 260 x 200 mm / 19.4 x 10.2 x 7.9 inch

• Price in first year of sale
• 690.00 Kc

• External source of data
• Erb

• Source of data
• Ceskoslovenske prijimace 1933-1945, Baudys 1947

• 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