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ID = 11582
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Double Pentode   Power/Output 
Identical to QP22B = K77B
Similar Tubes
Normally replaceable-slightly different:

Base British-7-Pin, old (M7A) (Codex=No)
Filament Vf 2 Volts / If 0.3 Ampere / Direct / Battery =
Dimensions (WHD)
incl. pins / tip
38 x 110 x mm / 1.50 x 4.33 x inch
Weight 49 g / 1.73 oz
Information source Taschenbuch zum Röhren-Codex 1948/49   
QP22B: Own Collection
Tor Steinnes

QP22B: Telefunken Werkstattbuch
Wolfgang Bauer

QP22B: Mullard Maintenance Manual 1954
Achim Dassow

from Just Qvigstad

Usage in Models 1= 1933? ; 1= 1937? ; 2= 1938 ; 1= 1939? ; 8= 1939 ; 2= 1948

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):15

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