• Country
• Germany

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

• Year
• 1967 ?

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

• Radiomuseum.org ID
• 157420

• Number of Transistors
• Semiconductors present.

• Semiconductors

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

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

• 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 - Telefunken Deutschland TFK,

• Shape
• Boatanchor (heavy military or commercial set >20 kg).

• Dimensions (WHD)
• 158 x 224 x 350 mm / 6.2 x 8.8 x 13.8 inch

• Notes
• LW / LW Vorsatzgerät zum E-639AW Empfänger von Telefunken, Versorgung über Multipolstecker an der Rückseite.
  Wellenbereiche: 9,8-23 kHz, 22,3-52,5 kHz, 51 - 125 kHz, 121,5 - 304 kHz, 285-570 kHz.
  Antennen Rahmen, Langdraht und Koaxial 50 Ohm schaltbar.

• Author
• Model page created by Martin Bösch. 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