Antique radios, Old Time Radios
CV209
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| Tube type: |
Pulse magnetron |
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Ca. 1925 up to 1945 very rare. *** |
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| Identical to |
CV209
= MX57
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| Similar
Tubes |
Normally replaceable-slightly different:
CV251
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| Predecessor Tubes |
CV108
725A
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| Was used by |
Radar |
| Filament |
Vf 6.3 Volts / If 0.8 Ampere / Half indirect |
| Description |
When in December 1942 in UK arrived design details of WE 725A strapped X-band magnetron both BTH and GEC were asked by TRE to design their own tubes, derived from that type. BTH, with the help of Sayers, the one who had devised the strapping technique at Birmingham, designed first the MX52 and soon later the MX57. In a magnetic field of 5000 Oe, it operated with an efficiency around 35%, giving about 45 kW output pulses. The design was completed in the summer 1942 and approved as CV209. Fitted with iron polepieces, it was supplied as plug-in replacement for CV108.
There was no volume production. TRE had already decided the use of WE 725A in new radar sets, so that CV209 was just used as replacement for CV108 in maintaining old sets.
13 kV at 11.5 A input, 45 kW output pulses typical. 9375 MHz.
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| Information source |
-- Original-techn. papers.
-- Original prospect or advert Callick, Metres to Microwaves
-- Collector info (Sammler)
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CV209: Manufacturer's Literature
Emilio Ciardiello
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Collection of
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