RE: Spektrum DX7 voltage
G'day Ed,
Too right, I have been having trouble with my radio lately, or at least I thought I was, turned out to be a faulty switch, in the plane.
I checked batteries, replaced leads, then the penny dropped, & I bypassed the switch, full voltage to RX.
I know that is nothing like your problem. Just venting. LOL.
Have you thought about contacting Horrizon Hobbies?
It might be worth sending in, for a checkup.
Cheers