Hi Josh, Instead of resistors, try diodes in series. Each Diode will drop your voltage. I have series a couple to get rid of standing voltage, especially if you are down to a half volt or so.
73 JIM On Mon, Jun 21, 2010 at 11:57 AM, Josh <josh.kit...@gmail.com> wrote: > > > I've been fighting this issue for a while now. I've tried some bandaids to > deal with it, tried multiple repeater controllers (including one I designed > myself with an ATMEGA328 Microcontroller (I'll probably be releasing this > design as open source coming up)... and I'm fighting the same problem > everywhere... My micor COS signal is weird. > > When the squelch is closed, I get right around 8 volts, taken from pin 8 of > the modified mobile audio/squelch board - the tried and true process just > about everybody uses..... When the squelch opens, I'm at not ground > potential, but right about half a volt. This isnt really the sort of logic > signal I want (I want this thing to be dead nuts zero, not half a volt). > > What is the deal here? > > I've tried adding resistors in series to fudge things and cause voltage > drop, but thats not really even working that well. I've tried the 2n2222 > circuit, but that doesnt really have a lot to do with this (although a > variation of that might come into play I suspect) > > How do I best solve this so I can get my repeater on the air?? This is very > close to the last issue I have remaining to solve. > > Help / advice is greatly appreciated. > > Josh > > > -- Jim Cicirello 181 Stevens Street Wellsville, N.Y. 14895 (585)593-4655
