Sam Goldwasser wrote in
:




The sample I have drives both the magnetron high voltage and filament
from the same transformer. I would think this is hard on the
magnetron at moderate power where the filament isn't as hot as it
should be but perhaps it's not a big issue.


lower filament voltage means longer tube life.
It would not be hard to include a regulated filament supply,though.

--
Jim Yanik
jyanik-at-kua.net