McVitie Weston valve collection

Made:
circa 1924 in United States
maker:
Osram
M-O AF amplifier valve, type D.E.4

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M-O AF amplifier valve, type D.E.4
Science Museum Group
© The Board of Trustees of the Science Museum

M-O AF amplifier valve, type D.E.4., B4 base, marked Y650, pinch marked 4 (RMW/C32B - McVitie Weston number), by Osram, c. 1924.

Details

Category:
Electronic Components
Object Number:
1972-141/453
type:
valve
credit:
STC plc