Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 28860
Great Britain (UK)
Brand: Ediswan, Siemens Edison Swan Electric Co.; London
Developer: Ediswan, Siemens Edison Swan Electric Co.; London 
Tube type:  Triode, vacuum   Power/Output 
  <1925 rare.
Identical to PV2_Ediswan
First year 1924 ? 70 Years of Radiotubes and V. p241
First Source (s)
1924 : British Radio Valves - The Vintage Years, Thrower pp,31, 32, 115
1924 : History of the British Radio Valve to 1940 p. 115
Successor Tubes PV2_DE  

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 6 Volts / If 1.5 Ampere / Direct / Battery =

Bright emitter. Not to be confused with completely different Dull Emitter PV2, here in RMorg as PV2_DE.
Thrower depicts a globe bulb. There is also a variant with a tapered bulb.

Information source Saga of the Vacuum Tube, Tyne   p.373
PV2_Ediswan: R.O.
Rudolf Osterkamp

PV2_Ediswan: Fin Stewart
Fin Stewart

PV2_Ediswan: Aus eigenen Unterlagen
Rudolf Osterkamp

from Just Qvigstad

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]