Rob wrote: >> Output transformer- more attention needs to be paid to its >>construction than any other part of the driver. This has been my experience as well - lots of problems with flash overs and heat in the windings. etc. >> GE Silicone II sealant I can't find this in my catalogues - is this silicon rubber? - I can see some that works to 260c and has a dielectric strength of 24kv/mm. +cures in a day. Alan Sharp (UK)