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PV2_Ediswan

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ID = 28860
       
Country:
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
Successor Tubes PV2_DE  

Base Europe 4-Pin (A, 4A, B4, since 1914)
Filament Vf 6 Volts / If 1.5 Ampere / Direct / Battery =
Description 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. 
Literature Saga of the Vacuumtube, Tyne   p.373
 
pv2.jpg
PV2_Ediswan: R.O.
Rudolf Osterkamp

 
pv2.gif
PV2_Ediswan: Aus eigenen Unterlagen
Rudolf Osterkamp


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