• Country
• Germany

• Manufacturer / Brand
• Fernfunk, Gesellschaft für drahtlose Telefonie mbH; Berlin

• Year
• 1926/1927

• Category
• RF (Radio Frequency-) Amplifier

• Radiomuseum.org ID
• 14503

• • Brand: GRB, Ges. für Radiobedarf mbH

• Number of Tubes
• 1

• Valves / Tubes
• LA77

• Main principle
• Radio Frequency Amplification only

• Tuned circuits
• 1 AM circuit(s)

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

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - - No sound reproduction output.

• Material
• Wooden case, TUBES VISIBLE.

• from Radiomuseum.org
• Model: HF-Vorstufe - Fernfunk, Gesellschaft für

• Dimensions (WHD)
• 190 x 75 x 140 mm / 7.5 x 3 x 5.5 inch

• Notes
• für Loewe Mod. OE333

• External source of data
• E. Erb 3-907007-36-0

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Other Models

• Here you find 66 models, 41 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Fernfunk, Gesellschaft für drahtlose Telefonie mbH; Berlin