One thing about peaking TX coils that really doesn't seem to get much exposure is that they can be over-peaked. As long as one sees the watts going up and up on the watt meter, one might assume that all of those watts are all clean watts. Not so. There are a couple of ways to determine this situation.
First is to hook up an o-scope on your sensing line to the watt meter to see if the waveform is remaining faithful to the same audio signal being put through the mic - ie - the sine wave stays true - no negative peak clipping. You will see this change when you go over the limit and over-peak the last couple of coils as the signal will get distorted.
Another way is not anywhere near as accurate, but it should be used as a final test. That would be to have another radio hear the output signal of the radio under test. Not an audio sample from the audio circuit either, as it is not the same, but an independent radio that is receiving the signal as transmitted. Little tricky to do this; there are a few small issues one has to overcome to make this happen. Another thing is that it is not anywhere near as reliable as the first method. In conjunction with; but not without the first method concurrently; never trusting method two on its own, as the ear is too easily fooled.
I have had to take this approach on Galaxy radios in particular. Too easy to over peak. Goes to prove once again that tuning a radio shouldn't be passed off as a simple operation that anyone can do with merely a watt meter and saying 'auuuudio; auuudio' into the mic to achieve a proper tune, and that there is no problem or mistakes made by this method. Nothing could be farther from the truth.
Not implying or saying that you are doing this, just thought it would be best to keep the tuning method pristine when working on the Galaxy in particular, and any radio in general . . .
