• Country
• Switzerland

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

• Year
• 1949–1951

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 11939

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

• Number of Tubes
• 5

• Valves / Tubes
• ECH21 ECH21 EBL21 AZ31 EM34

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

• Tuned circuits
• 6 AM circuit(s)

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

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

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 17 cm = 6.7 inch

• Material
• Wooden case

• from Radiomuseum.org
• Model: 502 - Deso, Dewald & Sohn, Dewald AG

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

• Dimensions (WHD)
• 460 x 275 x 215 mm / 18.1 x 10.8 x 8.5 inch

• Notes
• KW-"Pilot"

• Net weight (2.2 lb = 1 kg)
• 9.1 kg / 20 lb 0.7 oz (20.044 lb)

• Price in first year of sale
• 455.00 SFr

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

• Source of data
• -- Collector info (Sammler) / Radiokatalog Band 2, Ernst Erb

• Circuit diagram reference
• Thali-Schemasammlung und Tungsram-Röhrenbestückung.

• 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