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HL4

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ID = 14303
       
Country:
Hungary
Brand: Tungsram; Budapest (see also British T.)
Tube type:  Triode, vacuum   Universal 
Identical to HL4
First Source (s)
22.Nov.1935 : Wireless World (The), London (WW, 79)

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=F)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.65 Ampere / Indirect / Specified voltage AC/DC
Information source Babani, International Radio Tube Encyclopaedia   p. 108 & 109
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 102, p. 137
Taschenbuch zum Röhren-Codex 1948/49

hl4_so.png HL4: rtt
Anonymous 10 Collector


Just Qvigstad
Usage in Models 1= 1935 ; 1= 1936?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2
 
hl4_1.jpg

 

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