Wilkins patent 1859 throughway valve
Hydraulic back pressure valve, part sectioned
Rectifying valve
1940-1962
Example of "Bradford" Adjustable Piston Valve Ring
Mason patent 1886
Dexine Valve
Dexine Valve
Chromium steel valve from a steam engine indicator by McInnes-Dobbie Limited
1888 (design date)
Raymart 2CPS
P VR100 10E/278
VALVO RF24P 700
MAZDA EF86
AM VT62
RCA CRC-6AC VT247
LC CV136 KB/DC BOXED
PHILIPS C243 N
PHILIPS PE05/15
YALE 25
POVT 183 W43 5B/102D
JAPANESE UZ47 G
VALVO X4123
Thermionic Beam Tetrode Valve (VTB)
1950
JA CV9 KB/DA
Mullard type E55L large noual high mu beam tetrode valve (VTB)
1940-1960
TELEFUNKEN EL12
Wireless valve
Wireless valve
Wireless valve, Huth L.E.261, German 1923
Wireless valve
Siemens and Halske triode valve, c.1917
Valve, Osram KT2
Small outside grid wireless valve
Wireless valve
Small outside grid wireless valve marked "6921"
Wireless valve
Pin valve holder adapter with current monitoring socket
Telefunken valve Type E V N 171 - 1918
7 pin valve holder adapter
UV-199 type valve
S.625 gettered valve
Space charges grid valve No. 67
K.H.1 dummy valve
P.T. 235 dummy valve
Clack Valve
First valve amplifier set
1923
Single grid valve, C
McVitie Weston valve collection, STC valve, type VX7016
McVitie Weston valve collection, Mullard valve, type PM24D
1931
