The National Valve Museum

	2940 Valve Exhibits eg PX25 classic audio power triode new visitor? try here as a start Approximate Date of Introduction Valves listed by decade, or actual year where known Base Type Valves listed by the base type fitted eg footless or number of base pins Construction Index Details of the production technology and envelope shape used Electrode System Index Valves classified by the electrode system in the envelope eg triode or beam tetrode Exhibits with PDF data-sheets Click the valve name within the exhibit page to open the pdf datasheet Heater Characteristics Organised by heater voltage or current Makers Design Purpose A broad classification by original usage Manufacturers Exhibits indexed by maker plus some company details eg Mullard Update history or all valves in one long list
	Collections & Museums List of all the named collections present in the museum eg The Liverpool Collection
	Vintage Adverts and Boxes Fully Indexed Primary data from manufacturers eg BTH LF407 box or Mullard's EL84 audio pentode advert
	Technical articles Re-published articles eg Mullard 5-10 amplifier or Cossor 'Tin Hat' Valves
	Equivalents Index & references Listings of: valve types, dates, electrode system and characteristics for exhibits and non-exhibits
	Timeline of Valve History Milestones of valve technology development eg 1929 Olympia Show or the Wireless World review of 1919