Jerry,
I emailed you a fax I got from ON Semiconductor of the data sheet for the part. Their support line told me there isn't a direct replacement any more. If it's being used in a logic circuit, you could substitute standard gates to kludge it together, or maybe there would be some kind of electronics surplus store that might be able to help you find a suitable replacement. Sorry I can't be more help.
: Here's the next post in the continuing saga of my amp. The story so far:
: I've been trying to repair my Beta Lead for about two months now and it's
: really starting to depress me. I've fixed everything but the preamp now
: and I think I only need one part, but I can't find it anywhere!
: Can anyone help me find a MC14506BCP? It's a "dual expandable and or invert
: gate" according to the schematic.
: Does anyone have a toasted Beta Lead or Beta preamp that's good for parts?
: Help!!! Please!! I'm getting really depressed! Thanks-
: Jerry Jai
: jjai@uclink4.berkeley.edu