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Marconi Radio Valve Type MH4, by Marconi Company, England, c. 1931

Inventory Number: 20104

20104-1t 20104-2t

Date: c. 1931

Maker Details: Signed by Marconi's Wireless Telegraph Co. Ltd.

Inscription: "MARCONI / MARCONI'S / WIRELESS TELEGRAPH CO LTD MWTCL [LOGO]" printed on sticker attached to lower exterior surface of cage. See Documents for other inscriptions.

Size: 115 mm in overall length (including base pins)

Materials: Cooper, steel, plastic?, assorted metals.


Marconi Catkin Radio Valve Type MH4 with large copper cage around valve with polished black plastic? base and cap, and five steel base pins. Very unusual style of valve.

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