From: legg@nospam.magma.ca   
      
   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.   
      
   Film caps and diodes next?   
      
   RL   
      
   --- SoupGate-Win32 v1.05   
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