• Country
• Germany

• Manufacturer / Brand
• Braun; Frankfurt

• Year
• 1941/1942

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 1277

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

• Number of Tubes
• 4

• Valves / Tubes
• ECH3 EF9 EBL1 AZ1

• Main principle
• Superheterodyne (common); ZF/IF 128 kHz

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast, Long Wave and Short Wave.

• Power type and voltage
• Alternating Current supply (AC) / 110; 125; 145; 200; 220; 245 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 20 cm = 7.9 inch

• Material
• Wooden case

• from Radiomuseum.org
• Model: 4742W - Braun; Frankfurt

• Dimensions (WHD)
• 457 x 573 x 233 mm / 18 x 22.6 x 9.2 inch

• Notes

• Ch= Philips 655A. Sogenanntes Verlagerungsgerät.

• Net weight (2.2 lb = 1 kg)
• 9.3 kg / 20 lb 7.8 oz (20.485 lb)

• Source of data
• Lange / Nowisch, "Empfängerschaltungen der Radioindustrie" / Radiokatalog Band 1, Ernst Erb

• Circuit diagram reference
• Lange + Schenk

• Mentioned in
• Funkschau (Schaltungskarten Reihe J Karte 3 (1946))

• Literature/Schematics (1)
• Funkgeschichte der GFGF (Nr. 234, 235, 236 (2017))

• Other Models

• Here you find 1061 models, 931 with images and 651 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Braun; Frankfurt