Try this: http://www.prestonmoore.com/repeater.html
Notice the schematic for the ICS controller and the resistor placement for negative COS. Also, the image at the bottom gives you the particular on the pinouts. Preston Moore >Hi there I'm puting together a repeater package for >our local ham group >and run into a bit of a snag the IC-F121 radios >external COS signal is >active low but only floats around 0.9 volts the >controller I've got to >work with is a Crayfield CD-3P controller and it >doesn't reconize the >signal since the swing is so small. The easy solution >is to use a relay >to invert the signal, but I'm not sure what voltage/ >Amperage the horn >line on the radio will handle. Is there any one who >can help? > >Sean ____________________________________________________________________________________ Don't get soaked. Take a quick peak at the forecast with the Yahoo! Search weather shortcut. http://tools.search.yahoo.com/shortcuts/#loc_weather