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ID = 11550
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Tube type:  Transmitting Tube, Pentode, air cooled   Power/Output 
Identical to PT15
Similar Tubes
Normally replaceable-slightly different:
  CV1104 ; VT104
Other base and data slightly different:

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Fr) Top contact with a cap.
Was used by Transmittertube (Radio)
Filament Vf 6 Volts / If 1.3 Ampere / Direct / Specified voltage AC/DC

30W max plate dissipation.

15MHz max full ratings operating frequency.

Separate G3 pin for suppressor grid modulation.

Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
The Saga of Marconi Osram Valve

pt15_so.png PT15: rtt
Anonymous 10 Collector

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Just Qvigstad
PT15: GEC's catalogue supplement
Anonymous 413 Collector

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Usage in Models 1= 1940

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):1

Collection of



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