Improving the fidelity of AM reception audio

[wa2ise]

Originally Posted by asynchronousman

That's about it, Bob, but this is a trick some of us want to do to our vintage SS receivers, if we are truly lucky enough to have ANY music stations left. I would love to figure out how to widen it.

There's probably a ceramic IF filter buried in there. Most of those have about 10KHz passband, which yields 5KHz of audio at best. I've modified home stereo receivers to widen them from 5KHz to 10KHz. See my page
http://pw2.netcom.com/~wa2ise/radios...tml#solidstate
about halfway down. Only thing is that car radio sets are likely pretty crampt inside so fitting that new filter might be tough. A new wider band ceramic
filter might work (*IF* you can find one that is the same frequency as the old one in your digitally tuned radio, less critical if the tuning is analog) if you can find some. You might be able to find a usable one from a junked FRS radio or
cordless phone.