• Country
• Czechoslovakia

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

• Year
• 9999/9999 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 187107

• • alternative name: Telefony Microfona

• Number of Tubes
• 3

• Valves / Tubes
• AF7 AL1 AZ1

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

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

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

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 17 cm = 6.7 inch

• Material
• Wooden case

• from Radiomuseum.org
• Model: Doublette ID = 23095 - Microphona Mikrofona, Bratri

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 475 x 240 x 220 mm / 18.7 x 9.4 x 8.7 inch

• Notes
• Eingang für Plattenspieler. Ausgang für Zweitlautsprecher. Tonblendenschalter an der Rückseite.

• Net weight (2.2 lb = 1 kg)
• 9 kg / 19 lb 13.2 oz (19.824 lb)

• Author
• Model page created by Museum Roggenhofer. 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