>>Try to swap colector and emiter. You will end up with lower Uce (and also >>lower h21e). > >Do you mean i get lower Ucesat when i swap c and e? Yes, I meant Ucesat. >Can i really do that? I remember a very old article (it was at the time, when we were klimbing in trees here in Czech - at least what concerns electronic) about digital voltmeter, made from discrete components, roughly eqivalent of ICL7106, but driving these red-orange vakuum digit displays. At that time there was nothing close to FETs available to the poor engineers, so they used this trick for switching analog signals. I do not have hands-on experience with this, but you try out yourself. >Lower hFE i know, and probably lower Ucemax and other sideeffects... > >I once repaired a ignition system for car, and found they have swapped c >and e. >I thought that was a design error as it worked OK when i replaced it with a >new device which i reconnected to the normal way. Probably i did not >understand the smart thing... or the designer did not understand problem >with Ucemax or something... ====================================================================== Electronical devices for chemical laboratory, custom electonics design ---------------------------------------------------------------------- Snail Instruments Josef Hanzal Vojanova 615 phone/fax: +420-311-24433 266 01 Beroun e-mail: euroclass@pha.pvtnet.cz Czech Republic URL: http://www.vitrum.cz/snail/ ======================================================================