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ID = 64309
Great Britain (UK)
Brand: Amplion, Alfred Graham; GB (see also USA)
Developer: Metropolitan-Vickers (Metro-Vick, Cosmos); GB 
Tube type:  Triode, vacuum 
  Ca. 1925 up to 1945 very rare. ***
Identical to AMR6/9

Base Europe 4-Pin (A, 4A, B4, since 1914)
Was used by Radio/TV-reception etc.
Filament Vf 5.5 Volts / If 0.09 Ampere / Direct

As with other UK Amplion tubes/valves, this is a re-branded item.

Metropolitan-Vickers using the Cosmos brand were the main source for Amplion and this AMR6/9 is probably one of the SP (short path) tubes. See for example the SP18RR. The Amplion box for this tube has the words "short path".

The date is 1925 or 1926.

Literature -- Collector info (Sammler)   
The Wireless World, London (WW, 79)   Various 1925
AMR6/9: Frank Cuffe
Frank Cuffe


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