• Country
• Germany

• Manufacturer / Brand
• Tefag; Telephon Aktiengesellschaft vorm. J. Berliner

• Year
• 1925/1926

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 4910

• • alternative name: Telephon-Fabrik, AG vorm. J. Berliner

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

• Number of Tubes
• 5

• Valves / Tubes
• RE79 RE79 RE79 RE89 RE89

• Main principle
• TRF without regeneration; 2 Special; 2 AF stage(s); Neutrodyne

• Tuned circuits
• 4 AM circuit(s)

• Wave bands
• Broadcast (MW) and Long Wave.

• Power type and voltage
• Storage and/or dry batteries / 100+4 Volt

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Neutrodyne 1235 - Tefag; Telephon

• Dimensions (WHD)
• 535 x 270 x 335 mm / 21.1 x 10.6 x 13.2 inch

• Notes
• Voltmeter; 50-4000 m

• Net weight (2.2 lb = 1 kg)
• 16 kg / 35 lb 3.9 oz (35.242 lb)

• Price in first year of sale
• 390.00 RM

• Source of data
• Katalog Radio-Zentrale Prohaska 1928 / Radiokatalog Band 1, Ernst Erb

• Other Models

• Here you find 262 models, 181 with images and 108 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Tefag; Telephon Aktiengesellschaft vorm. J. Berliner