Yesterday I was using the ICOM IC7300 on WSJT and noticed that even though the power output was set at 40% and the audio drive levels set such that the output power was 25W, when the radio entered TX the PO meter shot up to 100%, then almost immediately back to 0% and then crept up over 3-4 seconds to the 25% it should be at. This was looking like the worst ALC overshoot I had ever seen - I wondered if this was something to do with the new firmware upgrade. I checked all the obvious things like PSU voltage and SWR et cetera, then I simplified the setup.
I have a very simple PC based audio tone generator so I set that up to generate a 1200Hz tone on the USB audio device from the IC-7300, then when I put the radio into PTT using either a CAT command or the mic PTT the radio "re-boots".
The radio has gone back to ICOM
Please read the full shocking article
https://g0mgx.blogspot.ca/2016/05/well-you-will-remember-last-time-that-i.html
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