• Country
• Germany

• Manufacturer / Brand
• Tonfunk GmbH; Karlsruhe

• Year
• 1950

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 25166

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

• Number of Tubes
• 6

• Valves / Tubes
• UF42 UCH42 UBF80 UL41 UM4 UY41

• Main principle
• Superheterodyne (common); ZF/IF 472/10700 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)     5 FM circuit(s)

• Wave bands
• Broadcast, Long Wave, Short Wave plus FM or UHF.

• Power type and voltage
• AC/DC-set / 110/220 Volt

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

• from Radiomuseum.org
• Model: Violetta UKW GW - Tonfunk GmbH; Karlsruhe

• Notes
• UKW-Demodulation mittels Flankengleichrichter. Magisches Auge UM4 ist gleichzeitig NF-Vorstufe!

• External source of data
• Rutishauser/EE

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Literature/Schematics (1)
• -- Original-techn. papers.

• Other Models

• Here you find 570 models, 334 with images and 240 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Tonfunk GmbH; Karlsruhe