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ID = 30860
Great Britain (UK)
Brand: Burndept Ltd. London
Developer: Burndept Ltd. London 
Tube type:  Triode, vacuum   Universal 
Identical to HL565
Similar Tubes
Normally replaceable-slightly different:
First year Sep.1925 The Wireless World, London (WW, 79)
First Source (s)
1925 : British Radio Valves - The Vintage Years, Thrower p.47

Base Europe 4-Pin (A, 4A, B4, since 1914)
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 0.65 Ampere / Direct / Battery =

Bright emitter tube. Designed as a near equivalent to the R5V.

This is one of the first series of valves designed by Capt. C F Trippe and manufactured by Burndept in their new Willesden factory in 1925.

HL565: R.O.
Rudolf Osterkamp

HL565: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector

Documents about this component
  Article in Wireless World 30-9-1925 1928 KB

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