Orthophon OR71

Orthophon OR71; Radiofrequenz GmbH; (ID = 638493) Radio
Orthophon OR71; Radiofrequenz GmbH; (ID = 2336) Radio Orthophon OR71; Radiofrequenz GmbH; (ID = 637865) Radio
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Orthophon OR71; Radiofrequenz GmbH; (ID = 2336) Radio
Radiofrequenz GmbH;: Orthophon OR71 [Radio] ID = 2336 278x525
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For model Orthophon OR71, Radiofrequenz GmbH; Berlin-Friedenau (später Loewe)
Country:  Germany
Manufacturer / Brand:  Radiofrequenz GmbH; Berlin-Friedenau (später Loewe)
Ges. für Radiotelephonie mbH
Year: 1925/1926 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 2:
Main principle TRF with regeneration; 1 AF stage(s)
Tuned circuits 1 AM circuit(s)
Wave bands Broadcast only (MW).
Power type and voltage Storage and/or dry batteries
Loudspeaker Horn
Power out
from Model: Orthophon OR71 - Radiofrequenz GmbH; Berlin-
Material Wooden case, TUBES VISIBLE.
Notes Audion, NF, integrierter Trichter.
External source of data E. Erb 3-907007-36-0
Source of data Radiokatalog Band 2, Ernst Erb
Mentioned in Funkgeschichte der GFGF (8966)
Picture reference Das Modell ist im «Radiokatalog» (Erb) abgebildet.
Documents about this model
  Orthophon Beschreibung 122 KB

All listed radios etc. from Radiofrequenz GmbH; Berlin-Friedenau (später Loewe)
Here you find 29 models, 19 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.