• Country
• Switzerland

• Manufacturer / Brand
• Deso, Dewald & Sohn, Dewald AG; Zürich

• Year
• 1952/1953

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 11953

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

• Number of Tubes
• 7

• Valves / Tubes
• ECH42 EF85 EF85 EABC80 EM34 EL41 AZ41

• Main principle
• Superheterodyne (common); ZF/IF 470 kHz

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast, Long Wave, Short Wave plus FM or UHF.

• Power type and voltage
• Alternating Current supply (AC) / 110-250 Volt

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: 521FM - Deso, Dewald & Sohn, Dewald AG

• Dimensions (WHD)
• 454 x 284 x 195 mm / 17.9 x 11.2 x 7.7 inch

• Net weight (2.2 lb = 1 kg)
• 8.6 kg / 18 lb 15.1 oz (18.943 lb)

• Price in first year of sale
• 520.00 SFr

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

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Other Models

• Here you find 184 models, 115 with images and 153 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Deso, Dewald & Sohn, Dewald AG; Zürich