Art Greenberg wrote:

they use magnetrons. I wasn't able to find any on-line references to
klystron based units. I also wasn't able to find any on-line product

The klystrons were used as local oscillators for the receiver.
In the smaller units, the magnetron was excited by a solid state
modulator circuit, but in the larger (25KW and up) commercial
marine units I worked on (Decca, Furuno, Kelvin Hughes) the modulators
where "valves", aka tubes


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Tim Daneliuk
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