4640W (K)

• Country
• Germany

• Manufacturer / Brand
• Braun; Frankfurt

• Year
• 1939/1940

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 1257

• Picture
• Schematics

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

• Number of Tubes
• 4

• Valves / Tubes
• ECH11 EBF11 ECL11 AZ11

• Main principle
• Superheterodyne (common); ZF/IF 488 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

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

• Power type and voltage
• Alternating Current supply (AC) / 110; 125; 150; 220; 240 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 4640W - Braun; Frankfurt

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 570 x 305 x 280 mm / 22.4 x 12 x 11 inch

• Notes

• Variable Bandbreite.

• Net weight (2.2 lb = 1 kg)
• 13.2 kg / 29 lb 1.2 oz (29.075 lb)

• Price in first year of sale
• 197.00 RM

• Source of data
• Handbuch WDRG 1939 / Radiokatalog Band 1, Ernst Erb

• Circuit diagram reference
• Lange+Schenk+FS-Röhrenbestückung

• Literature/Schematics (1)
• -- Schematic (OTO-Schaltungen)

• Picture reference
• Das Modell ist im «Radiokatalog» (Erb) abgebildet.

• Other Models

• Here you find 1067 models, 936 with images and 653 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Braun; Frankfurt