info nec ab amp ic w amp secs possible pspice models hi being a electronic engineering student with only electronic ii under my belt i find myself needing to build a moderate wattage audio amp so i ll throw out a couple of question for the vast knowledge of the net please explain how watts are calculated in audio amp circuits no not p i e just how it relates to one of the following ai current gain av voltage gain ap power gain or whatever i already have a wonderful cheap i e schematic for a w amp but i would like to cross improve the circuit the problem is that the parts list has ic and ic as nec ab amplifiers they look like pin sip packages with a heatsink this schematic was published in a mag so it may be non existant now anyway i tried looking up a replacement in the latest digi key cat and found it not listed the closes i could figure was a pin sip as tda bu anyone got any ideas i thought hey i can rin a pspice simulation using opamp models yea great it worked but i guess the wasn t made for high power amps as a result i got a voltage gain of mv v worse than i started with does anyone have a pspice ckt file with cheap yet good gain how about some models for some of the chips listed in this e mail any ascii chip info you guys can send me i m open to suggestions ideas comments help please e mail since i have little time to search the news and i ll post if there s and interest john ibm ee majors do it best atari john d zitterkopf rules jdz ra msstate edu jdz msstate bitnet aol zitt aol com jdz isis msstate edu
