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Old 5th Jun 2021, 6:25 pm   #47
FERNSEH
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Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
Default Re: HMV 1920 made in 1960.

"The ORP60 is like an OC71 devoid of paint I believe."

Hi Trevor,
was that the OCP71?
https://www.radiomuseum.org/tubes/tube_ocp71.html

Correction: the light sensitive device in the HMV has been determined as an ORP12 cadmium- sulphide cell.

DFWB.
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