• Country
• Switzerland

• Manufacturer / Brand
• Autophon AG (inkl. Téléphonie SA); Solothurn

• Year
• 1941–1943

• Category
• Pre-stage (adaptor for SW/FM/VHF/UHF incl. built-in), Frequency converter

• Radiomuseum.org ID
• 297780

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

• Number of Tubes
• 2

• Valves / Tubes
• UCH21 UBL21

• Main principle
• TRF with diode detector

• Tuned circuits
• 2 AM circuit(s)

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

• Details
• Wired Wireless Receiver (RF!)

• Power type and voltage
• Powered by external power supply or a main unit.

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: HF-TR Vorsatzgerät RD5947a - Autophon AG inkl. Téléphonie

• Shape
• Chassis only or for «building in»

• Notes

• HF-TR Vorsatzgerät mit UCH21, UBL21 für NF-TR Allstromgeräte.

• Mentioned in
• -- Original-techn. papers.

• Author
• Model page created by Adrian Riesen. See "Data change" for further contributors.

• Other Models

• Here you find 244 models, 187 with images and 148 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Autophon AG (inkl. Téléphonie SA); Solothurn