• Country
• Germany

• Manufacturer / Brand
• Telefunken Deutschland (TFK), (Gesellschaft für drahtlose Telegraphie Telefunken mbH

• Year
• 1970 ??

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

• Radiomuseum.org ID
• 221813

• Main principle
• RF Converter/Adapter (not voltage converter)

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

• Details
• Converter

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

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Längstwellen-Zusatz LW639/2 - Telefunken Deutschland TFK,

• Shape
• Tablemodel, high profile (upright - NOT Cathedral nor decorative).

• Notes
• Telefunken Längstwellen-Zusatz LW639/2;
  LW/LW Vorsatzgerät, Versorgung über Multipolstecker an der Rückseite.

• Net weight (2.2 lb = 1 kg)
• 4.640 kg / 10 lb 3.5 oz (10.22 lb)

• Author
• Model page created by a member from A. See "Data change" for further contributors.

• Other Models

• Here you find 3562 models, 3147 with images and 2113 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Telefunken Deutschland (TFK), (Gesellschaft für drahtlose Telegraphie Telefunken mbH