Скачать или смотреть Unboxing A Marconi Z66 Pentode Vacuum Tube

Unboxing a Marconi Z66 high-slope sharp cut-off vacuum tube. This valve is probably new & in its original box. (NOS New Old Stock, NIB New In Box). The valve base is a black international octal A08 K8A with a metal skirt. The valve has a top connection cap. The clear glass envelope has a label with THE MARCONIPHONE CO. LTD., Marconi, B.V.A. & MADE IN ENGLAND UNDER BRITISH PATENTS. Printed in white on the glass envelope inside a rectangle is Z 66 & HA 4.
The one end of the box has Marconi, OPEN THIS END, Z66, the BVA logo, 17/6. & P. TAX EXTRA. Printed on the inside flap is "This valve has been thoroughly tested before leaving the Works, and no responsibility can be accepted for valves used at other than the published ratings." The other end of the box has Marconi Valve & OPEN OTHER END. The inner flaps have printed "MADE AT THE WORKS OF THE M.O. VALVE CO LTD. FOR THE MARCONIPHONE CO. LTD." & "E S & A ROBINSON LTD BRISTOL FOLDING BOX MAKERS O/N G 25796" & "BT3B".

The Z66 has a heater filament voltage requirement of 6.3 volts & was first introduced in 1948.

For more information on this valve:
http://www.r-type.org/exhib/act0007.htm (GEC Z66 version)
http://www.r-type.org/exhib/aaa0354.htm (Marconi Z66 version)
http://www.r-type.org/exhib/aam0024.htm (Marconi Z66 version)
http://www.r-type.org/exhib/abp0007.htm (Marconi Z66 version)
http://www.r-type.org/exhib/aau0002.htm (Unknown Z66 version)
https://www.radiomuseum.org/tubes/tub... (Z66 version)

For more information on M-OV (Marconi-Osram Valve Company)
https://en.wikipedia.org/wiki/Marconi...
http://www.r-type.org/static/makem-ov...

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

For information on CV "Common Valve" part numbers:
https://www.valvecollector.uk/cv-valv...

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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Videoed on Tuesday, 5th April 2022 © Mike Fairman 2022 Worcester

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Unboxing Vintage Electronic Components