UH,
You are probably hearing the side tone. This is what you want when
using a headset. Try this:
On the side of the radio is a hole with a sidetone adjusting pot
labled with a headset pictogram. Use a screwdriver and turn the screw
inside the hole. The other hole is for adjusting squelch threshold.

Rex Mayes
Williams Soaring Center

On Apr 5, 5:49*am, wrote:
Does anyone have experience with audio on transmit being heard over
the speaker?
It does not have intercom wired and we believe it is wired according
to available wiring diagram.
Have manual which has no troubleshooting section.
Have tried changing battery also.
Thanks UH