| Tinker 
  Guru
 
  Joined: 07/11/2007
 Location: AustraliaPosts: 1904
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        | Posted: 10:17am 18 Mar 2018 |  |  |  |  
 
 Thanks for your informative updates poida.
 
 I use two primary chokes, one the high frequency 3 or 4 turn ferrite affair on the high side and a non saturating 9 turn choke on the low side.
 
 This seems to work for me, switching on an abrasive cutoff saw on top of a steady 4KW load has not killed it yet.
 Klaus
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