Marconi Valve Data 1928

Marconi Valve Data 1928

Specifications and characteristic curves for their range of receiving and transmitting valves. Each valve is pictured along with an introduction to its use and operating data.  Click the thumbnails to enlarge.  The valves covered are:
Two volt types: S215, DEH 210, DEL 210, HL 210, DEP 215, DEP 240, PT 235.


Four volt types:S 410, DEH 410, DEL 410, DEP 410, P 425.

Six volt types: S 625, S 610, DEH 610, DEL 610, HL 610, DEP 610, P 625, P625a, DE 5, DE 5A, DE 5B, LS 5, LS 5A, LS 5B, LS 6A.

Indirectly heated cathode: KH1, KL 1AC

Mains types: S.8, H.8, HL.8, P.8, PT.8, PT 240 (Withdrawn), PT 235 (Withdrawn)

Rectifying valves: U 4, U 5, U 8, U 9

Transmitting valves: T 15, T 30, T 50, T 250, DET 1, DET 1SW