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7D8

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ID = 9534
       
Country:
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Tube type:  Vacuum Pentode   Power/Output 
Identical to 7D8 = ARP9 = CV889 = PTA

Base British-7-Pin, old (M7A) (Codex=N)
Was used by Radio/TV-reception etc.
Filament Vf 13 Volts / If 0.65 Ampere / Direct
Description

Reference material refers to this tube being branded Brimar.

 
Information source History of the British Radio Valve to 1940   p. 144 & 189
Babani, International Radio Tube Encyclopaedia   p. 16 & 17
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49

551_4.png 7D8: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
Usage in Models 6= 1936? ; 1= 1936 ; 1= 1937

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):8

Collection of

 
gb_brimar_7d8.jpg

 

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