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ID = 20508
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Double Beam Power Tube   VHF 
Identical to QQV04-20 = 815 = CV2663 = QV04-20

Base Octal (Int.Octal, IO) K8A, USA 1935 2 Top contacts.
Was used by Transmittertube (Radio)
Filament Vf 12.6 Volts / If 0.8 Ampere / Indirect / Specified voltage AC/DC

VHF power dual tetrode. Intended for use as RF oscillator or amplifier well above 100 MHz as well as audio amplifier in modulator stages.

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
x 116 x 59 mm / x 4.57 x 2.32 inch
Information source Babani, International Radio Tube Encyclopaedia   p. 242 & 243
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 475, p. 1035
QQV04-20: RTT Schwandt
Günther Stabe † 19.8.20

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