McVitie Weston valve collection, Hivac valve, type A15
1937
NT46 or NT57 silica triode valve from the early ground radar transmitter type TF3
1936
NT46 or NT57 silica triode valve from the early ground radar transmitter type TF3, 1936
1936
Radio valve type 4036 A, micro-ray tube
R.C.A. all metal radio valve type 6c5
Radio valve, Marconi Osram D.E.7
Radio receiving valve R.A.F. type C
McVitie Weston valve collection, Hivac valve, type B220
1937
Radio valve, MS/PEN A
Radio valve, B.T.H. R.H.1
Radio valve, Mazda P.P. 5/400
Radio valve, Osram P.T. 625
Radio valve, Mazda U.U.2
Radio valve, Ediswan U 235
Radio valve R.C.A., type 47, pentode
Radio valve R.C.A., type 83, mercury rectifier
Radio valve - 4278 A, screened grid
Radio valve - AC/T6, air cooled transmitting
Radio valve G.T.5 E, Thyratron, gas filled relay
McVitie Weston valve collection, Hivac valve, type D210
McVitie Weston valve collection, Hivac valve, type D210
Radio valve - C.A.T.15 for ultra short waves
Radio valve B.T.27, shield grid Thyratron
Radio valve
Radio valve type 4304 A
Radio valve, Mazda U.U. 120/500
Radio valve, standard Micromesh P.B.1
Loewe radio valve, type 2HF
Loewe radio valve
Radio valve, Osram L.S.5.6.
Radio valve, Mazda A.C. V/P1
Radio valve, Mazda A.C.S/G
Radio valve
Radio valve, Philco 36E (AC/DC screened grid)
Radio valve, Mullard PZ1-35
Hivac Y220 Harries beam tetrode
PT54 (Hivac Z220 Harries) beam tetrode
Radio valve, Mazda Q.P.240
Hivac B220 radio valve
Radio valve, Marconi M.S.4
Radio valve, Brunswick 238
Radio valve R.C.A., type UX 222, screened grid
Radio valve, Mazda AC/TP
Radio valve, Marconi Osram R.5V
Radio valve, Ferranti H.4.D.
Radio valve, Mazda V.914
Radio valve - P.T.25, output pentode
Radio valve, Siemens - Halske O.R.
