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ID = 44758
Great Britain (UK)
Brand: Marconi's Wireless Telegraph Co. Ltd.
Tube type:  Beam Power Tube   Power/Output 
Identical to TT22 = 7624
Similar Tubes
Heater different:

Base Octal (Int.Octal, IO) K8A, USA 1935 Top contact with a cap.
Filament Vf 12.6 Volts / If 0.8 Ampere / Indirect / Parallel, (AC/DC)
Description Designed for use as RF amplifiers with full power rating up to 30MHz. Also useful as audio amplifiers and pulse modulators.

Pa <37.5W for commercial service or <45W for intermittent or amateur service.

Va<1250, Ik<230mA.
Typical Output Powers:
RF: 80W SSB class AB1;
for Audio in push-pull: 100 W (Push-Pull 43% tap,Ultra-Linear Connected).

P out for RF: up to 174 W in I.C.A.S.; for Audio in push-pull: 200 W. 

Dimensions (WHD)
incl. pins / tip
52 x 131 x 52 mm / 2.05 x 5.16 x 2.05 inch
  TT22: Debeg
Heinz Höger
TT22: S.D.
Siegfried Droese

TT22: Debeg
Heinz Höger


from Just Qvigstad

Usage in Models 1= 1972? ; 2= 1973?? ; 1= 1973? ; 1= 1973 ; 2= 1975??

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):7

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