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ID = 78059
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Double Beam Power Tube   beam power   VHF 
Identical to CV2666 = QQV07-40 = 829B

Base Septar (1+6 pins) 2 Top contacts.
Was used by Transmittertube (Radio)
Filament Vf 12.6 Volts / If 1.25 Ampere / Indirect / Specified voltage AC/DC

Dual tetrode for use up to 250 MHz.

Pa <20W per anode.

Centre-tapped heater for use at 6.3V

Dimensions (WHD)
incl. pins / tip
x 105 x 58 mm / x 4.13 x 2.28 inch
Weight 100 g / 3.53 oz
Information source - - Manufacturers Literature   
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   p. 38

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