X63 frequency changer heptode pentagrid converter vacuum tube. The valve is used & not in its original box. The valve base is a black international octal A08 K8A. The valve has a top connection cap. Printed on the glass envelope is the broad up arrow (British Government mark), P, X63 & MADE & PATENTED IN ENGLAND. Also printed on the glass is AMP99. I do not know if AMP99 is factory, date or batch codes. The box has X63 handwritten in pen on both ends. The type X 63 has a filament voltage of 6.3 volts & was first introduced in 1937.

This valve is part of my collection & is not for sale.

For more information on this valve:
[ Ссылка ] (M-OV version)
[ Ссылка ] (Marconi version)
[ Ссылка ] (Marconi version)
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[ Ссылка ] (6A8G version)
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BVA The British Radio and Valve Manufacturers' Association
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For information on CV "Common Valve" part numbers:
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For information on old stores part numbers:
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Vacuum tube, thermionic valve, electron tube
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Unboxing video of vintage electronic components. To watch more vacuum tube & vintage electronic component videos please click on the link below
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Videoed on Saturday, 23rd May 2020 © Mike Fairman 2020 Worcester

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Unboxing Vintage Electronic Components

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