wrote in message
ups.com...

Both the CB and the PA horn have the usual standard mini jacks on them.
Trouble is, when I try to use it, all I get is a horrible piercing
feedback whine when I press the mic.

So either the Cobra DXIII doesn't work as a PA system, or I am missing
something simple.

I didn't have the speaker anywhere near the mic, so it's not like it
was picking up feedback through that.



That is exactly what is happening... With the unit set to PA, turn the
volume on the CB all the way down to nothing, and key the mike... Bet the
squeal is gone... Now turn up the volume to just where is starts to squeal,
then back it down just a little. That point is as loud as you will be able
to get the PA...