valve, tube, thermionic, electron, triode, tetrode, pentode, power,
magic eye, tuning indicator, nixie, history, data, data sheet,
specification, amplifier, radio, octal, B9A, B7G, B4, IO, KT88,
KT66, 12AX7, 12AY7, 12AT7, ECC81, ECC82, ECC83, 6L6, 6V6, EL34,
EL84, EM34, EM80, EM81, EM85, Mullard, Cossor, GEC, Gold Lion,
Marconi, Svetlana, Brimar, Ferranti, RCA, Sylvania, GE,6202,
amperex, arcturus, brimar, channelmaster, colvern, cossor dario,
debanks, edicron, ediswan, ei, elpico, emi emston, era, eratron,
ever-ready, ferranti, ge, gec heinz, kaufman, haltron, hivac, hrs,
itt, jackson lamba, lorenz, marconi, mazda, mullard, national,
osram philips, rank, raphone, raytheon, rca, rft, selectron sovtek,
standard, svetlana, sylvania, telefunken, tronix, tungsram united,
valvo, westinghouse, zaerix
Hivac - under construction
The High Vacuum Valve Company began production in
1932??. They specialised in miniature valves for hearing aids
and portable radios, although they did also make full sized valves
of very high quality - e.g. this
PX230. Their boxes
were particularly attractive.
I have some data and/or prices for the following types:-
B220
D210
H210
L210
P210SW
P220
PP220
PX230
PX230SW Review, Advert
SG210
SG220SW
V220
VS210
XD Review, Curves, Advert 1, Advert 2, Advert 3
XL Review, Curves, Advert 1, Advert 2, Advert 3
XP
XSG Review and Curves, Advert 1, Advert 2, Advert 3
XY Advert 1, Advert 2
Y220
Z220
Here are thumbnails which link directly to the adverts,
which are shown in approximately chronological order, and contain some
data. They are all from the T&R Bulletin between 1933 and 1937.
The Transmitting and Receiving Bulletin was the official journal of
the Radio Society of Great Britain before the Second World War.
