• Country
• Switzerland

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

• Year
• 1950

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 71143

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

• Number of Tubes
• 1

• Valves / Tubes
• ECH21

• Number of Transistors
• Semiconductors present.

• Semiconductors
• OA51

• Main principle
• TRF with diode detector; 1 AF stage(s); none

• 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
• Alternating Current supply (AC) / 220 Volt

• Loudspeaker
• - For headphones or amp.

• Material
• Bakelite case

• from Radiomuseum.org
• Model: HF-TR Vorsatzgerät E74V - Autophon AG inkl. Téléphonie

• Dimensions (WHD)
• 185 x 90 x 130 mm / 7.3 x 3.5 x 5.1 inch

• Notes
• Das Gerät dient der Selektion, Vertärkung und Demodulation der 6 Programme des schweizerischen Telefonrundspruchs (Drahtfunk) und zur Pegelanpassung als Vorsatz zu einem vorhandenen NF-Telefonrundspruchgerät.

• Net weight (2.2 lb = 1 kg)
• 1.8 kg / 3 lb 15.4 oz (3.965 lb)

• External source of data
• CRGS Mitteilungen 2001/3

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Literature/Schematics (1)
• -- Schematic

• Author
• Model page created by Felix Schaffhauser. See "Data change" for further contributors.

• Other Models

• Here you find 242 models, 185 with images and 147 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Autophon AG (inkl. Téléphonie SA); Solothurn