Nothing wrong with using any good reference material you can find in any potential design. Many of the people on this group ask how they can best learn about repeater related electronic circuits and I can't think of an easier method than kit building a well done kit circuit.
We can always pick the short comings out of most any applied circuit design and selected parts, including the later version micro processor repeater controller. One can't discount the education of hands on building a 555 Timer COR Control Circuit or porting the application toward an op amp design like the Hamtronics COR-3 circuit. Many companies trying to sell lots of a product are primarily driven to certain parts by unit cost. If the specified part does the same job for much less money... in it goes. I can easily use an LM-324 in a large number of applications and they're cheap. I can also find even cheaper parts that do the same job. Then of course I have some higher end $13 per package audio op-amps here. They of course will never see the inside of a repeater interface package. But radio communcations audio is not hi-fidelity, it need only be clear & loud to the users ear. So far it hasn't been magic to make the LM-324 work fairly well in many general repeater circuit applicaiton. cheers, s. > Ron Wright <[EMAIL PROTECTED]> wrote: > > Skipp, > > The LM324 has many good features for low level requirements. High offset voltage (2 typ, 7 max, always design to max) and cross over distortion has always been an problem with much of what I do. It having 4 in a package is a plus and it has its place. > > I should not say it, but I would not use Hamtronics as a source > for design although I've been amazed at some things they do, hi. > > I would not use 324 for audio, but there are other applications. > > 73, ron, n9ee/r
