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SP4/U1

Información - Ayuda 
ID = 33288
       
País:
Gran Bretaña (GB)
Marca: Tungsram (Tube Brand), Tungsram Electric Lamp Works (Great Britain), Ltd.; London, British Tungsram Radio Works, Ltd.; London
Diseñador: Tungsram; Budapest (see also British T.) 
Tipo:  Vacuum Pentode   UHF 
Idéntica a SP4/U1
Base Europe side contact P8A (Au P, 8SC) 2 Top contacts.
Usada en Radio/TV-reception etc.
Filamento Vf 4 Volt / If 0.7 Ampere / Indirect / Specified voltage AC/DC
Descripción

This tube was designed by tungsram, Hungary as a special type of UHF tube for ultra short waves. It was designed with three cathode leads to minimise inductance feedback. Cathodes were connected by way of tthe two top caps.

 
Literatura Wireless World (The), London (WW, 79)   p. 246, March 16th, 1939

Just Qvigstad
 
uk_sp4_u1.jpg

 
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