Hello Marco,

My  loading coil drifts as it warms up, but that's only when a kW or so
is  run,  not  at  low power. But I think you are testing into a dummy
load?   I  also had a poor drain waveform on one side of my push pull
Class  "D",  that  was  only cured by changing one of the 2 FET's (that
tested  fine  out  of circuit). We "microwavers" are old school now that
people are moving to DC toggled every hour or so ;)



Friday, June 2, 2017, 2:00:07 PM, you wrote:

> Hi Alan,

> and thanks for joining :-)
> it's hard to believe at this stage that is correct to speak of "high 
> currents"..
> The PA is an half bridge like 
> Andy's 700W but now I'm testing at low voltage: I see these problem 
> trepassing the 30Vdc supply level (and power is about 15W)..
> Anyway will try with the "pulse rated caps" you suggested just in case
> my "low current" "low tension" ideas are wrong.
> 73 Marco
















-- 
Best regards,
 Chris                            mailto:[email protected]