On Thu, 16 Jan 2003, Peter L. Peres wrote: > On Thu, 16 Jan 2003, Vasile Surducan wrote: > > *>a. you can't paralleling the zenners > > Yes you can. They appear to have a 'series' resistor equivalent to their > dynamic resistance when you do. Power dissipation will not be equal and > will get worse if they are not thermally coupled. > Peter, this reminds me the last trick I've seen into a defective monitor. The guy have mountend in parallel two HV transistors driving the same HV transformer. Of course that one having the great h21 and shortest connections to the transformer has die and the other is quite healty, thank you. The same with zenners. You'll never find a product having five zenners in parallel. Also five zenners in series ! :) With other things you have said I'm agree, I read too fast the question and thinking to a simple inductive device. best, Vasile -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads