> Without going down the whole reverse engineering, desgn calculation > path, does someone have a simple, rule of thumb value for emitter > resistors to promote current sharing in parallel'ed bipolar transistors ? > Now that I actually need 5A .. //.. have 2 2N3055's in parallel .. Hello Steve, Take 1 ohm 5Watt resistors. That was always standard practice for me. You can find resistive wire in heating elements or just take thin copper wire (of the right length) if you don't have that kind of resistors. At van Wijk. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads