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ID = 28580
Great Britain (UK)
Brand: Radions Ltd., Radion Works; Bollington
Developer: Radions Ltd., Radion Works; Bollington 
Tube type:  Triode, vacuum   Universal 
  <1925 rare.
Identical to GP
First year 1926 Saga of the Vacuumtube, Tyne page 393
First Source (s)
1924 : British Radio Valves - The Vintage Years, Thrower

Base Europe 4-Pin (A, 4A, B4, since 1914)
Filament Vf 4 Volts / If 0.5 Ampere / Direct / Battery =

Bright emitter. Advertised in 1925 as low cost valve/tube at 7 shillings (0.35 GBP).

Dimensions (WHD)
incl. pins / tip
54 x 130 x 27 mm / 2.13 x 5.12 x 1.06 inch
Weight 52 g / 1.83 oz
Literature The Wireless World, London (WW, 79)   Radions Advertisement September 1925
Peter den Boer

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

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