Peter P. yahoo.com> writes: > I thought about dV/dt but my dV/dt is not so terribly high. The input is a > reasonably almost-sine wave from a dc/dc converter through a simple filter. Thinking further on this, there are dual gate thyristors which allow the dV/dt to be controlled a little better, like the low power BRY39. Are there such things for higher power, in the triac class ? Peter P. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist