Originally Posted by wkindred
you could run your vtx off the flight battery by connecting the vtx to the flight battery balance tap. don't think that would introduce any additional ground loop issues.
found this info on the 3s balance tap wiring in another post but the basic premise could be used for packs with any number of cells -
"...the black wire of the balance tap is neg. Simply count over (you could check it with a volt meter but there is really no need).
The first wire after the neg is 4.2v (charged), the 2nd wire will give you 8.4v and the third wire gives the full 12.6…”
hope this helps!
This will also result in an unbalanced battery.