• Country
• Switzerland

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

• Year
• 1942–1945

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 12340

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

• Number of Tubes
• 6

• Valves / Tubes
• ECH21 ECH21 EBL21 EBL21 EM4 AZ1

• Main principle
• Superheterodyne (common); ZF/IF 128 kHz; 2 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast, Long Wave and Short Wave.

• Power type and voltage
• Alternating Current supply (AC) / 110; 125; 145; 200; 220; 245 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 24 cm = 9.4 inch

• Material
• Wooden case

• from Radiomuseum.org
• Model: M163AX - Mediator; La Chaux-de-Fonds

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

• Dimensions (WHD)
• 630 x 400 x 260 mm / 24.8 x 15.7 x 10.2 inch

• Notes
• Tuning scale light bulbs type: unknown but 6,3 Volt certainly.
  Connectors for second loudspeaker and for pick-up. 
  Push-pull output stage. Chassis divided into 2 parts. Variable bandwidth with switch.
   
  The radio is for AC mains and is prepared for DC connecting a vibrator convertor.
   
  Comparable with Siera S172, Jura 172X and Philips 925X-39. 

• Price in first year of sale
• 625.00 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.

• Literature/Schematics (1)
• -- Original-techn. papers.

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

• Other Models

• Here you find 371 models, 325 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