• Country
• Switzerland

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

• Year
• 1944/1945

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 11886

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

• Number of Tubes
• 4

• Valves / Tubes
• ECH4 ECH4 EBL1 AZ1

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

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast and Short Wave (SW).

• 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: 451B [Erste Ausführung mit ECH4] - Deso, Dewald & Sohn, Dewald AG

• Dimensions (WHD)
• 475 x 280 x 205 mm / 18.7 x 11 x 8.1 inch

• Notes

• Siehe auch 2. Ausführung mit ECH21.

• Net weight (2.2 lb = 1 kg)
• 8.8 kg / 19 lb 6.1 oz (19.383 lb)

• Price in first year of sale
• 375.00 SFr

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

• Source of data
• Radiokatalog Band 2, Ernst Erb

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

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

• 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