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QP240

Information - Help 
ID = 11584
       
Country:
Europe
Brand:
Tube type:  Double Pentode   Power/Output 
Identical to QP240
First year Sep.1934 The Wireless World, London (WW, 79)

Base B9 British 9-Pin (Codex=Yx)
Filament Vf 2 Volts / If 0.4 Ampere / Direct / Battery =
Description Hivac and Mazda are known manufacturers.
Va=Vg2 <150; gm=4mA/V @ Ia=Vg2=100, Vg1=0.
 
Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
 
mazda_qp240_bild1.jpg
QP240
Rudolf Osterkamp

 
base_qp240.png
QP240: own collection
Peter den Boer

 
qp240.png
QP240: own collection
Peter den Boer


Usage in Models 5= 1934 ; 4= 1935 ; 1= 1936

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):10


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