"Hi James
I've just posted the scope readings. Amazingly, it disproves the hypothesis and in fact PixHawk has a clean PWM wave at 3.0v connected to either ESC while drawing up to 25amps.
The only other possibility whereby this could still be an issue…"
"Hi James
Thanks for your comment. Having just read the thread links you sent, and in particular some of your comments and reasoning it certainly looks like you've identified the issue.
I do have a scope - albeit a cheap one…"