• Country
• Switzerland

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

• Year
• 1945/1946

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 11897

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

• Number of Tubes
• 9

• Valves / Tubes
• EF22 ECH21 EF22 ECH21 EM4 EBL21 AD1 AD1 AZ4

• Main principle
• Superhet with RF-stage; ZF/IF 470 kHz

• Tuned circuits
• 9 AM circuit(s)

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

• Power type and voltage
• Alternating Current supply (AC) / 110; 125; 145; 220; 250 Volt

• Loudspeaker
• 2 Loudspeakers

• Material
• Wooden case

• from Radiomuseum.org
• Model: Royal 455F - Deso, Dewald & Sohn, Dewald AG

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

• Notes
• 4xKW: 13,6 - 17,0 m (22,0-17,6 MHz); 16,8-22,7 m (17,8-13,2 MHz); 22,4-34 m (13,4-8,8 MHz); 33,3-68 m (9,0-4,4 MHz); 2xMW: 65-200 m (4,6-1,5MHz); 192,5-577 m (1560-520kHz); LW: 698-2000 m (430-150 kHz). Abstimmkreise: 1 Vorkreis (Antennenkreis); 1 Zwischenkreis; 1 Oszillatorkreis. Zwischenfrequenzkreise: 2 Zwischenfrequenzkreise im ersten Bandfilter; 2 Zwischenfrequenzkopplungskreise

• Price in first year of sale
• 1,080.00 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.

• Mentioned in
• Das Elektron 1948 Heft 1

• Literature/Schematics (1)
• Das Elektron 1948 Heft 1

• Other Models

• Here you find 183 models, 113 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