• Country
• Czechoslovakia

• Manufacturer / Brand
• Sigma-Radio, Ing. B. Szathmary; Prag

• Year
• 1936/1937

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 23245

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

• Number of Tubes
• 4

• Valves / Tubes
• AB2 AF7 AL4 AZ1

• Main principle
• TRF with diode detector; 2 AF stage(s)

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Wave Bands given in the notes.

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

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: Koncert Sigma - Sigma-Radio, Ing. B. Szathmary

• Shape
• Tablemodel, high profile (upright - NOT Cathedral nor decorative).

• Price in first year of sale
• 990.00 CSK

• External source of data
• Erb

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

• Other Models

• Here you find 49 models, 26 with images and 32 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sigma-Radio, Ing. B. Szathmary; Prag