ORIGINAL: Bax
We'd have no idea why your servos are failing. It's not likely to be the receiver, though. The receiver can handle the voltage quite well...it has its own regulator for its internal circuitry. We'd look to the abilty of your servos to handle the unregulated LiPo voltage. That's the most likely source. Even trying Futaba servos may result in the same thing, unless you're using the HV (High Voltage) servos that are just starting to come out. There is no way the receiver can cause damage to your servos.
You'll need to check with the makers of the servos to see what the difficulty may be. Perhaps sending them to their respective service centers would be a first step.
Bax-
The Hitec7940TH are high voltage servos. They're part of Hitec's premium line of digital high voltage servos. I did send the servos back to Hitec for them to evaluate/repair if they are indeed damaged. Per my first post, I also had this problem while using a 6V NiMh battery as well. Is it possible that running the Rx in HR mode instead of Normal mode coupled with the high amp draw is degrading the signal strength just enough to cause eratic behavior? I used the JR servos with another reciever for years with no problems. It wasn't until I started using the 614FF that my problems began. Im just trying to look into all possible causes to prevent it from happening again. Does it matter that I'm using channels 1&2 vs. 3&4? I would imagine that it doesn't make a difference. Any suggestions are greatly accepted.
On another note: When do you expect the new 614FS Rx to be available?
Thanks again,
Matt