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PV2_Ediswan

Information - Aide 
ID = 28860
       
Pays:
Royaume Uni
Fabricant: Ediswan, Siemens Edison Swan Electric Co.; London
Concepteur: Ediswan, Siemens Edison Swan Electric Co.; London 
Type:  Triode, vacuum   Power/Output 
  <1925 rare
Identique à PV2_Ediswan
Similaires
Remplaçants avec petites différences :
  B205
Première série 1924 ? 70 Years of Radiotubes and V. p241
Première source
1924 : British Radio Valves - The Vintage Years: 1904-1925 pp,31, 32, 115
1924 : History of the British Radio Valve to 1940 p. 115
Successeurs PV2_DE  
Culot Europe 4-Pin B4 (Eu A, E, 4A) 1914
Utilisé par Radio/TV-reception etc.
Chauffage Vf 6 Volt / If 1.5 Ampère / 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. The "pinch" in the globe shaped bulb is flat while in the tapered bulb it is of a four cornered "X design.

 
Bibliographie Saga of the Vacuum Tube, Tyne   p.373
70 Years of Radiotubes and V.   p. 192
British Radio Valves - The Classic Years: 1926-1946
b4_base_pins~~227.png PV2_Ediswan: Fin Stewart
Fin Stewart

Just Qvigstad 		pv2.gif
PV2_Ediswan: Aus eigenen Unterlagen
Rudolf Osterkamp

Collection de

Konrad Birkner † 12.08.2014 (D)
 
pv2.jpg

 

Variantes

this tapered variant is not mentioned in Thrower.
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