Submarine-repeater pentode, P.O. type 6P10, 1950-1970

Made:
1950-1970 in England

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Science Museum Group Collection
© The Board of Trustees of the Science Museum

Submarine-repeater pentode, P.O. type 6P10, made by the Post Office, England, 1950-1970.

Valves used in submarine telephone cables need to be very long lasting, due to the effort and cost involved in retrieving a cable from the seabed in order to replace one. The 6P10 valve was used in shallow water submarine communications systems. It had a platinum core, as tests at the Post Office Research Centre had shown that this was more effective at preventing resistance increase. 6P10 valves were used in submerged repeaters laid between Holyhead and Dublin, and Lowestoft and Hague in 1953-1954.

Details

Category:
Electronic Components
Materials:
glass, metal (unknown), paint and plastic (unidentified)
Identifier:
1974-123
type:
thermionic valve
taxonomy:
  • component - object
credit:
Donated by the Post Office Research Department