List of historic valves in the ase-museoedelpro collection |
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Here a list of the historic valves in the collection, including
a survey of early valves, up to mid 1930s, power and transmitting tubes, VHF
and UHF types, tubes designed for radar application and several very early
prototypes designed and built during the British radar development,
magnetrons, klystrons, and conventional gridded types. There are also more
recent types added because of their operating principles or even because they
are evolutions of early types. |
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The ASE-Museoedelpro collection includes several hundred types
of valves. This is only a partial list that will be updated as more valve
records are ready. Last update: Rev. 0, January 2025. |
Type |
Description |
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1B42 |
Mercury
spark gap, radar pulse modulator. Western Electric Liquid mercury was used to
continually renew the surface of the negative electrode |
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** |
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2H21 |
Phasitron'
FM modulator, General Electric. Also available the 5593. |
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2J21 / 2J21A |
Magnetron,
very early unstrapped X-band, 1941. Westinghouse |
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2J22 ÷ 2J29 |
Family
of S-band magnetrons. 250 kW typical pulses |
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2J36 |
12-vane
X-band magnetron. Still unstrapped, it appeared early in 1942, being
registered to Raytheon only after the war, in October 1945. Used in the
AN/MPN-1 ground controlled precision approach radar system. |
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2J38 / 2J39 |
Fixed
frequency low power magnetrons operating at 3.300 MHz. Integral magnet.
Registered to Raytheon in October 1945, RMA record 445. |
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2J51A |
Packaged
magnetron mechanically tunable from 8.5 to 9.6 GHz. 20 to 70 kW peak power by
moving one to four magnetic shunts. Western Electric. Full description given
in 1946 in the Bell System Technical Journal. |
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2J55 / 2J56 |
Fixed
frequency variants of the 2J51A |
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2J61(A) /
2J62(A) |
Mechanically
tunable S-band magnetrons with overlapping frequency coverage. Designed to
replace the family of fixed frequency types 706AY to 706GY. Registered to
Raytheon in October 1945, RMA record No. 445. |
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2K33 (A, B) |
Raytheon
K-band reflex klystron. Derived from early prototypes of VX302 developed in
UK in the Clarendon Laboratory from 1941. In the UK the devvelopment of the
24 GHz radar was abandoned due to the excessive attenuation caused by water
vapor. |
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2K50 |
K-band
reflex klystron developed in 1944 by Western Electric. Thermally tuned by
electronic bombardment. Waveguide flange. |
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3B600 |
Power
triode intended for electro-medical applications. Fivre |
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3C27(B) /
3C37 |
UHF
power triode derived from the British milli-micropup family. National Union
replaced the flying wires with a coaxial connector and in the 3C37 added a
finned radiator on the grid connection for better pulse operation when the
grid was heavily driven positive. |
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3F3-TRX |
Forced-air
cooledn 3 kW transmitting triode. Fivre |
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3F20-TA |
Transmitting
triode, external radiator or water jacket.
22 kW. Fivre |
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3F22-TA |
Transmitting
triode, compact folded anode variant of the 3F20-TA. Fivre |
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4C27 |
UHF
transmitting triode, 'micropup' style. U.S. equivalent to British CV92,
CV199, NT99 and to Canadian REL 7 |
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4C28 |
UHF
transmitting triode, 'micropup' style. Designed by RCA for the SHORAN
navigation system. |
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