Скачать или смотреть X63 Frequency Changer Heptode Pentagrid Converter Vacuum Tube

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.

For more information on this valve:
http://www.r-type.org/exhib/aad0064.htm (M-OV version)
http://www.r-type.org/exhib/aaq0530.htm (Marconi version)
http://www.r-type.org/exhib/abm0005.htm (Marconi version)
http://www.r-type.org/pdfs/x63.pdf
http://www.r-type.org/exhib/aaa1130.htm (6A8G version)
http://www.r-type.org/pdfs/6a8g.pdf
https://www.radiomuseum.org/tubes/tub...
https://www.radiomuseum.org/tubes/tub...

BVA The British Radio and Valve Manufacturers' Association
https://en.wikipedia.org/wiki/British...

For information on old stores part numbers:
https://frank.pocnet.net/other/Servic...

Vacuum tube, thermionic valve, electron tube
https://en.wikipedia.org/wiki/Vacuum_...

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