Wade Bequest collection of valves
Wade Bequest collection of valves
Wade Bequest collection of valves: early triode 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 valve by Marconi-Osram
Wade Bequest collection of valves: early triode radio valve by Marconi-Osram, 1926
1926
Wade Bequest collection of valves: early triode radio valve by Marconi-Osram
Wade Bequest collection of valves: early triode radio valve by Marconi-Osram
Wade Bequest collection of valves: experimental triode radio valve by Marconi-Osram
Wade Bequest collection of valves: triode radio valve
Wade Bequest collection of valves: full-wave recitifier radio valve
Wade Bequest collection of valves: early triode radio valve by Marconi-Osram
Wade Bequest collection of valves: radio valve without base
Wade Bequest collection of valves: World War One German triode radio valve
1916
Wade Bequest collection of valves: early triode radio valve by Marconi-Osram
Wade Bequest collection of valves: experimental triode radio valve by Marconi-Osram
1915
Wade Bequest collection of valves: early tetrode radio valve by Marconi-Osram
1916
Wade Bequest collection of valves: pentode radio valve
Wade Bequest collection of valves: experimental Catkin triode radio valve by Marconi-Osram
Wade Bequest collection of valves: four-electrode radio valve by Marconi-Osram
1920
Wade Bequest collection of valves: early triode radio valve by Marconi-Osram
Wade Bequest collection of valves: early four-electrode radio valve by Marconi-Osram. With B4-3 base
Wade Bequest collection of valves: early triode radio valve by Marconi-Osram
Wade Bequest collection of valves: early triode radio valve by Marconi-Osram
Wade Bequest collection of valves: experimental triode radio valve
Wade Bequest collection of valves: early triode radio valve, by Marconi-Osram
Wade Bequest collection of valves: early triode radio valve
Wade Bequest collection of valves: early triode radio valve by Marconi-Osram
Wade Bequest collection of valves: early R-type triode radio valve
Wade Bequest collection of valves: early R-type triode radio valve
Wade Bequest collection of valves: early triode radio valve
Wade Bequest collection of valves: miniature radio valve mounted in valve
Wade Bequest collection of valves: R-type triode radio valve
Wade Bequest collection of valves: early R-type triode radio valve
Wade Bequest collection of valves: experimental radio valve
Wade Bequest collection of valves: R-type triode radio valve
Wade Bequest collection of valves: triode radio valve
Wade Bequest collection of valves: early triode radio valve by Marconi-Osram
Wade Bequest collection of valves: early triode radio valve by Marconi-Osram
Wade Bequest collection of valves: experimental radio valve
Wade Bequest collection of valves: triode radio valve, by Marconi-Osram
Wade Bequest collection of valves: small triode radio valve, by Marconi-Osram
1921
Wade Bequest collection of valves: small triode radio valve, by Marconi-Osram
Wade Bequest collection of valves: experimental radio valve, 1918
1918
Wade Bequest collection of valves: experimental triode radio valve
Wade Bequest collection of valves: triode radio valve, by Marconi-Osram
Wade Bequest collection of valves: R-type triode radio valve
Wade Bequest collection of valves: small triode radio valve
Wade Bequest collection of valves: small diode radio valve
Wade Bequest collection of valves: early transistors mounted in plastic tube
Wade Bequest collection of valves: Small transmitting triode, by Marconi-Osram
Wade Bequest collection of valves: Small transmitting triode
Wade Bequest collection of valves: Small R-type triode radio valve
Wade Bequest collection of valves: Small R-type triode radio valve without base
1917
Wade Bequest collection of valves: Small R-type triode radio valve without base
Wade Bequest collection of valves: Small R-type triode radio valve without base
1916
Wade Bequest collection of valves: Small R-type triode radio valve without base
Wade Bequest collection of valves: Very small triode radio valve
Wade Bequest collection of valves: Box containing two transistors
Wade Bequest collection of valves: Box containing two transistors and two diodes
Wade Bequest collection of valves: V24-type radio valve
Wade Bequest collection of valves: Experimental four-electrode radio valve
Wade Bequest collection of valves: V24-type radio valve
Wade Bequest collection of valves: V24-type radio valve. Tubular bulb with two end caps and two side caps
Wade Bequest collection of valves: V24-type radio valve
Wade Bequest collection of valves: V24-type radio valve
Wade Bequest collection of valves: V24-type radio valve
Wade Bequest collection of valves: V24-type radio valve
Wade Bequest collection of valves: DEQ radio valve
Wade Bequest collection of valves: V24-type radio valve
Wade Bequest collection of valves: V24-type radio valve
Wade Bequest collection of valves: V24-type radio valve
Wade Bequest collection of valves: Small triode radio valve without base
Wade Bequest collection of valves: Small triode radio valve without base
Wade Bequest collection of valves: Small triode radio valve without base
Wade Bequest collection of valves: Catkin triode radio valve, by Marconi-Osram
Wade Bequest collection of valves: Catkin triode radio valve, by Marconi-Osram
Wade Bequest collection of valves: Catkin triode radio valve, by Marconi-Osram
Wade Bequest collection of valves: Small triode radio valve
Wade Bequest collection of valves: Marconi-Osram radio valve
Wade Bequest collection of valves: Small B11 triode radio valve
Wade Bequest collection of valves: DEQ radio valve
Wade Bequest collection of valves: V24 radio valve
Wade Bequest collection of valves: DEV radio valve. Tubular bulb with two end caps and two side caps
Wade Bequest collection of valves: DEV radio valve. Tubular bulb with two end caps and two side caps
Wade Bequest collection of valves: DEV radio valve. Tubular bulb with two end caps and two side caps
Wade Bequest collection of valves: small triode radio valve, by Osram-GEC
Wade Bequest collection of valves: Early triode radio valve described as 'soft' Silver valve
Wade Bequest collection of valves: Cosmos 'short path' radio valve
Wade Bequest collection of valves: LT1 radio valve
Wade Bequest collection of valves: R4 triode radio valve
1917
Wade Bequest collection of valves: DEVX triode radio valve, by Marconi-Osram
Wade Bequest collection of valves: UV202 triode radio valve
Wade Bequest collection of valves: Triode radio valve, by Marconi-Osram
Wade Bequest collection of valves: DEVX triode radio valve, by Marconi-Osram
Wade Bequest collection of valves: NR18 triode radio valve
Wade Bequest collection of valves: Seddig RJW radio valve made in Wurtzburg
Wade Bequest collection of valves: R2A radio valve
Wade Bequest: DE6 triode radio valve with blue tint
