Moto used two or three different numbers for the Micor squelch chip, all of which are interchangeable.
You can salvage a chip off any audio-squelch board (but I wish you'd do the cannibalization to a mobile board as the base station and repeater boards are not as common). See <http://www.repeater-builder.com/rbtip/micor-index.html> <http://www.repeater-builder.com/rbtip/micorsquelch.html> And you can use a complete Micor audio-squelch board intact - just provide a source of 9.6v (but it will work just fine on anything from 9 to 10v, as long as it is stable and clean), discriminator audio, and a pair of 25K pots (I've used 50K pots, a much more common value, with no problems). I've seen complete tested boards for $5 on eBay. Note that the PL decoder plugs on to the audio-squelch board. Mike WA6ILQ At 03:48 PM 09/10/07, you wrote: >Hello everyone! I am in the process of building a repeater system for >the National Boy Scout Radio Station in Dallas, and the audio board >calls for a M7716 Micor squelch chip. Since our organization works >off of donations mainly, I have to work with what I have. I haven't >been able to find it anywhere these days, and was wondering if anyone >had one (two ideally, one for a backup), that they would be willing to >part with, or, perhaps someone that has an old stock of them? > >Any help is appreciated. > >73, > Eric > > > > > > >Yahoo! Groups Links > > >
