Wade Bequest collection of valves: full-wave recitifier radio valve
Wade Bequest collection of valves: full-wave rectifer radio valve
Wade Bequest collection of valves: early triode radio valve
Wade Bequest collection of valves: early triode radio valve
Wade Bequest collection of valves: World War One German triode radio valve
1916
Wade Bequest collection of valves: pentode radio valve
Wade Bequest collection of valves: UHF radio valve of "Micropup" construction
Wade Bequest collection of valves: unknown radio valve
Wade Bequest collection of valves: Early triode radio valve described as 'soft' Silver valve
Wade Bequest: DE6b triode radio valve with green tint
Wade Bequest: DER triode radio valve
Wade Bequest collection of valves: Cossor type 6AK8 radio valve
Wade Bequest collection of valves: R4 triode radio valve
1917
Wade Bequest collection of valves: unknown radio valve
Wade Bequest collection of valves: GEC type U339 radio valve
Wade Bequest collection of valves: Marconi-Osram Valve radio valve X41
Wade Bequest collection of valves: Mazda type DD620 radio valve
Wade Bequest collection of valves: Western Electric radio valve Type 394A
Wade Bequest collection of valves: radio valve VU120A
Wade Bequest collection of valves: Sylvania radio valve 1625
Wade Bequest collection of valves: RENS1204 radio valve
Wade Bequest collection of valves: unknown radio valve
Wade Bequest collection of valves: VHF radio valve
Wade Bequest collection of valves: unknown radio valve
Wade Bequest collection of valves: radio valve Type 8
Wade Bequest collection of valves: Cosmos type AC radio valve
Wade Bequest collection of valves: Clarion radio valve type LP2
Wade Bequest collection of valves: R valve
Wade Bequest collection of valves: Ediswan radio valve type DLS4
Wade Bequest collection of valves: Rogers Valve radio valve type VT61
Wade Bequest collection of valves: Western Electric Type 357A
Wade Bequest collection of valves: EIMAC radio valve type VC12-32
Wade Bequest collection of valves: radio valve
Wade Bequest collection of valves: radio valve
Wade Bequest collection of valves: German radio valve
Wade Bequest collection of valves: early R-type triode radio valve
Wade Bequest collection of valves: type 6G?? radio valve
Wade Bequest collection of valves: radio valve
Wade Bequest collection of valves: radio valve
Wade Bequest collection of valves: radio valve
Wade Bequest collection of valves: Emerson radio valve 6SD7-GT
Wade Bequest collection of valves: radio valve
Wade Bequest collection of valves: radio valve
Wade Bequest collection of valves: radio valve
Wade Bequest collection of valves: radio valve
Wade Bequest collection of valves: Mazda radio valve type CV65
Wade Bequest collection of valves: radio valve
Wade Bequest collection of valves: radio valve
