From legg@21:1/5 to All on Sun May 5 12:32:50 2024
Came across a switch-mode boost converter in a microwave HT
supply today.~ normal magnetron. Output of the high frequency
transformer looks to be a voltage doubler with 32x12mm film
caps doing the job of the old 120Hz can.
Paderno Mwo021 seems to have had a pretty flakey reliability.
The controller in this one gives the magnetron supply three
chances to produce a feedback amplitude, they quits.
The HT supply into the magnetron shows 'some' output during
these attempts but is visibly falling before each cut-off.
I found a dry solder joint where the HT winding returns to
the ref ground. I assumed this would have just arced over
without much interference in basic function. Anyways
behavior unchanged when restored.