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ID = 28498
Great Britain (UK)
Brand: Radions Ltd., Radion Works; Bollington
Developer: Radions Ltd., Radion Works; Bollington 
Tube type:  Triode, vacuum 
  Ca. 1925 up to 1945 rare.
Identical to DE34HF
First year 1926 Saga of the Vacuum Tube, Tyne Seite 393
First Source (s)
1925 : British Radio Valves - The Vintage Years, Thrower

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Filament Vf 1.8 Volts / If 0.34 Ampere / Direct / Battery =
Description RF ampl. det., RCC ampl. 
Dimensions (WHD)
incl. pins / tip
36 x 106 x 28 mm / 1.42 x 4.17 x 1.10 inch
Weight 41 g / 1.45 oz
Peter den Boer

DE34HF: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector

from Just Qvigstad

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