• Country
• Switzerland

• Manufacturer / Brand
• Mediator; La Chaux-de-Fonds

• Year
• 1948–1950

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 12385

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

• Number of Tubes
• 5

• Valves / Tubes
• ECH21 EAF41 EAF41 EBL21 AZ1

• Main principle
• Superheterodyne (common); ZF/IF 452 kHz

• Wave bands
• Broadcast, Long Wave and more than two Short Wave bands.

• Power type and voltage
• Alternating Current supply (AC) / 125-220 Volt

• Loudspeaker
• Permanent or electro-dynamic (moving coil), system not known yet. / Ø 21 cm = 8.3 inch

• Material
• Bakelite case

• from Radiomuseum.org
• Model: 231A - Mediator; La Chaux-de-Fonds

• Dimensions (WHD)
• 450 x 300 x 220 mm / 17.7 x 11.8 x 8.7 inch

• Notes
• rundlich;mit TR=550.-

• Price in first year of sale
• 495.00 SFr

• External source of data
• E. Erb 3-907007-36-0

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Circuit diagram reference
• Die Tungsram-Tabellen führen das Modell auf.

• Picture reference
• Das Modell ist im «Radiokatalog» (Erb) abgebildet.

• Other Models

• Here you find 370 models, 324 with images and 225 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Mediator; La Chaux-de-Fonds