The National Valve Museum

	3211 Valve Exhibits eg PX25 classic audio power triode new visitor? try here as a start Actual Year Introduced if known or Approximate Decade Base Type eg Footless etc. or pin numbers Construction pinch, Planar etc. / envelope shape eg Catkin Electrode System eg triode or beam tetrode etc. Exhibits with PDF data-sheets Heater Characteristics heater/filament voltage or current Makers Design Purpose audio, radio, TV etc. Valves by Make + some company details eg Mullard or Cossor Update history or all valves in one long list
	Collections & Museums eg The Liverpool Collection or G8LSD Collection
	Vintage Adverts and Boxes eg BTH LF407 box or Mullard's EL84 audio pentode advert
	Technical articles or Films re-published. eg Mullard 5-10 amplifier or Cossor 'Tin Hat' Valves
	Valve Equivalents & References valve types, dates, electrode system and characteristics
	Timeline of Valve History eg 1929 Olympia Show or the Wireless World review of 1919