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RU 3

RU 3 ; Uddenberg, Ralf A. (ID = 2614052) Radio RU 3 ; Uddenberg, Ralf A. (ID = 2614053) Radio
RU 3 ; Uddenberg, Ralf A. (ID = 2614054) Radio RU 3 ; Uddenberg, Ralf A. (ID = 2614055) Radio
RU 3 ; Uddenberg, Ralf A. (ID = 2614056) Radio
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RU 3 ; Uddenberg, Ralf A. (ID = 2614052) Radio
Uddenberg, Ralf A.: RU 3 [Radio] ID = 2614052 1400x1052
Select picture or schematic to display from thumbnails on the right and click for download.
For model RU 3, Uddenberg, Ralf A. (RU); Göteborg:
eBay_353355223348, seller vint-25
Country:  Sweden
Manufacturer / Brand:  Uddenberg, Ralf A. (RU); Göteborg
Year: 1926 ? Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 3: A409 B406 B406
schematic requested
Main principle TRF with regeneration
Tuned circuits 1 AM circuit(s)
Wave bands Broadcast (MW) and Long Wave.
Power type and voltage Storage and/or dry batteries / 4 & ? Volt
Loudspeaker - This model requires external speaker(s).
Power out
from Model: RU 3 - Uddenberg, Ralf A. RU;
Material Wooden case
Shape Tablemodel, low profile (big size).
Dimensions (WHD) 365 x 220 x 175 mm / 14.4 x 8.7 x 6.9 inch

Regenerative detector.

Literature/Schematics (3) Le Guide du Collectionneur TSF Biraud/Foster, Vol. II (page 367)

Model page created by Ernst Erb. See "Data change" for further contributors.

All listed radios etc. from Uddenberg, Ralf A. (RU); Göteborg
Here you find 7 models, 2 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.