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PM252

Information - Help 
ID = 16192
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Triode, vacuum   Power/Output 
Identical to PM252
First Source (s)
1929 : History of the British Radio Valve to 1940 P. 165

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.4 Ampere / Direct / Battery =
Description

"Super Power" Valve. Gm= 3.7mA/V Ia=11.0 for Va=100 and -Vg=6.0. Optimum load 4.5k ohm. Early Mullard data gives filament current=0.3A.

 
Information source Taschenbuch zum Röhren-Codex 1948/49   
Babani, International Radio Tube Encyclopaedia   p. 130 & 131
- - Manufacturers Literature
 
pm252.jpg
PM252: RFJ
Roy Johnson

More ...
 
b4_base_pins~~413.png
PM252: Fin Stewart
Fin Stewart

 
pm252.png
PM252: Mullard Maintenance Manual 1954
Achim Dassow


from Just Qvigstad

Usage in Models 2= 1928 ; 1= 1929 ; 1= 1932

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4


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