Submarine repeater pentode, 1950-1970

Made:
1950-1970 in England
Submarine repeater pentode, PO type 6P12, made by the Post Office, England, 1950-1970.
      
      Valves used in submarine

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Submarine repeater pentode, PO type 6P12, made by the Post Office, England, 1950-1970. Valves used in submarine
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Submarine repeater pentode, P.O. type 6P12, made by the Post Office, England, 1950-1970

Submarine repeater pentode, PO type 6P12, 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 6P12 valve was designed for use in deep water systems. They were used in a submarine cable laid between Aberdeen and Bergen in 1954, as it was able to withstand the pressure of being laid deep under the sea. 6P12 valves were also used in the British section of the TAT-1 transatlantic telephone cable.

Details

Category:
Electronic Components
Materials:
glass, metal (unknown) and plastic (unidentified)
Identifier:
1974-124
type:
thermionic valve
taxonomy:
  • component - object
credit:
Donated by the Post Office Research Department