I? was looking at manual for ver. 1.03, which corresponds to what I have. Apparently, the default is 5000.? Audio gain can also be set through a CAT command, and then the scale is divided by 256: I assume the numbers you give correspond to this last scale. I have tweaked the audio gain, to no avail so far. I continue looking. Or perhaps it is a malfunction of my QDX.? Thank you again, ft.