• Country
• Switzerland

• Manufacturer / Brand
• Zellweger AG; Uster

• Year
• 1945 ?

• Category
• Wired Receiver (AF only)

• Radiomuseum.org ID
• 13834

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

• Number of Tubes
• 3

• Valves / Tubes
• EF22 ELL1 or 6F6 AZ21

• Main principle
• Audio-Amplification; 2 AF stage(s)

• Wave bands
• - without

• Details
• Wired Wireless Receiver(AF only)

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

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• from Radiomuseum.org
• Model: Uster DF44 - Zellweger AG; Uster

• Notes
• NF-Telefonrundspruch

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

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Circuit diagram reference
• Die «Thali Schemasammlung» führt das Modell.

• Other Models

• Here you find 80 models, 59 with images and 25 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Zellweger AG; Uster