the choke is the only device, that I did not change. All the other methods were tried and invain. However, I did not dare connecting D to S for the reasons, you mentioned. I even thought of the PSU,
nonconducting side. Eather a steady current and heat on the FET's or by adding a cap from D to G. This may be a mistake, but please remember you may have peaks to 200V on the drains and a limit of 20
[...] I even thought of the PSU, which is stabilized by 5 times 3055. Is that cazy? No. If you get inexplicable behaviour in a piece of electronics and none of the obvious things cure it, check the