Hi Tom, The simple answer is you only need a resistor and a capacitor to make a basic de-emph network.
The next in line simple de-emph network would be some type of active device (transistor or op-amplifier) with a de-emph feedback layout. Keep in mind the de-emph networks don't remove the ctcss (sub tone). If you want a few resistor-capacitor values to try... email me direct and I'll set you up. No, I didn't engineer them... I "lifted" the values I'll give you from the original GE Master Pro Repeater Audio card. Hard to re-invent something that works so well... (original credit where it's due). cheers, skipp skipp025 at yahoo.com > "Tom" <[EMAIL PROTECTED]> wrote: > The 850 RX out sounds like de-emph. I > need to come up with a fix to make the de-emph audio from the 850 > back into flat audio. > Any ideas? > 73s > Happy new year > NB2A > Tom

