• Country
• Switzerland

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

• Year
• 1952–1954

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 11965

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

• Number of Tubes
• 5

• Valves / Tubes
• ECH42 EF41 EBC41 EL41 AZ41

• Main principle
• Superheterodyne (common); 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Long Wave and/or Very Low Frequency (VLF).

• Details
• Wired Wireless Receiver (RF!)

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

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Material
• Wooden case

• from Radiomuseum.org
• Model: HF-Telefonrundspruch-Gerät 539 - Deso, Dewald & Sohn, Dewald AG

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 455 x 285 x 195 mm / 17.9 x 11.2 x 7.7 inch

• Notes
• Nur Langwelle, 6 fest eingestellte Frequenzen für die 6 schweizer HF-TR-Sender.

• Price in first year of sale
• 325.00 SFr

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

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Literature/Schematics (4)
• -- Schematic

• 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