Thanks, that was it. And you know what. Now that I see it, I do recall reading about that power op-amp in one of my Forest Mimms books years ago.
Also it is interesting in that they used a 2W driver in a bridged configuration to drive a transistor amp. I guess higher power op-amps were not available at the time, and using the one op-amp helped reduce the transistor count. Thanks a lot!!! Albert --- In [email protected], DCFluX <dcf...@...> wrote: > > Err. LM-1877 > > On Fri, Jul 23, 2010 at 1:35 PM, DCFluX <dcf...@...> wrote: > > Oops, didn't realize it was the stereo version, Try LM1887. > > > > On Fri, Jul 23, 2010 at 1:28 PM, DCFluX <dcf...@...> wrote: > >> Just by your description of the pins, I would suggest you look at the > >> LM-380, 2.5W amplifier. They are tied together as they act as the > >> chips heatsink. > >> > >> On Fri, Jul 23, 2010 at 1:19 PM, hitekgearhead > >> <hitekgearh...@...> wrote: > >>> Hey Guys. I was looking at the schematic for the above mentioned speaker > >>> (thank you repeater builder site) and I had a few questions. > >>> > >>> First, does anyone know where to find a replacement for the 5184320A99 > >>> dual op-amp labeled U1? > >>> > >>> Secondly, Is this op-amp basically being used as a buffer, preamp, and > >>> inverter? > >>> > >>> Thirdly, what on earth are pins 3, 4, 5 and pins 10, 11, 12 doing? I have > >>> never seen so many pins on an op-amp tied together. > >>> > >>> Thanks! > >>> Albert > >>> > >>> > >>> > >>> > >>> > >>> ------------------------------------ > >>> > >>> > >>> > >>> Yahoo! Groups Links > >>> > >>> > >>> > >>> > >> > > >
