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ID = 19963
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Vacuum Pentode   VHF 
Identical to YL1000 = 8463

Base Noval, 9 pin miniature (USA pico-9) B9A
Filament Vf 1.1 Volts / If 0.88 Ampere / Direct / Parallel, (AC/DC defined voltage)
Description Fast warm up. 70% power in <0.5s. For Mobile transmitters. 
Dimensions (WHD)
incl. pins / tip
22 x 68 x mm / 0.87 x 2.68 x inch
Weight 18 g / 0.63 oz
Information source - - Manufacturers Literature   
YL1000: Frank Cuffe
Frank Cuffe

YL1000: Telefunken Taschenbuch 1971
Anonymous 15 Collector

YL1000: Manufacturer's Literature
Emilio Ciardiello

from Just Qvigstad

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