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
US-Navy CFT-15E
US-Navy CFT-15E Early 1940's UHF power triode.
CFT-15E Triode
A WWII aircraft radar triode operating
in the B- and C-band range at 400 - 600 MHz. (~50cm.)
The heater draws 4.2A at 5.5V. The maximum anode
dissipation is 20W continuous but when used in
pulse mode up to 15 kW can be produced.
The grid is a cage of vertical bars,
as seen in a few other RF power valves, e.g.
3/500Z and
fed from the top. The heater is formed from a
spiral supported by a central bar, so that both
connections are made from the same end. The anode
is side fed. This arrangement allows for the use
of RF screening between the anode, grid and
cathode circuits and of very high anode voltages,
up to 15 kV.
