Antique radios, Old Time Radios
LMS12
| Was used by |
Radar |
| Filament |
Vf 12.6 Volts / If 1.8 Ampere / Half indirect |
| Description |
LMS12 was one of the few multi-cavity magnetrons designed in Germany during the war. Intended to operate at 3 cm, its anode block had 18 cavities. As opposed to LMS10, copied from a British magnetron, this looks to be an original German design. The system of resonators is placed transversely with respect to the tube axis. Anode and cathode were assembled on a ceramic disc and then inserted into the upper sleeve and brazed to it. Anode was conduction-cooled through the sleeve to a suitable radiating mount. Some doubts arise on the efficiency of a 18-cavity structure, but likely German technicians relied on a control loop on the current flowing in the electromagnet to stabilize its operation.
- 16 kV at 10 to 15 A input pulses. 1900 to 2100 gauss magnetic field.
- 3.05 to 3.35 cm wavelength
- 10 kW output power typical
Used in a few tens of Berlin D airborne X-band radar sets and in some other sets still experimental when the war ended.
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| Information source |
Taschenbuch zum Röhren-Codex 1948/49
-- Collector info (Sammler)
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Collection of
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