RE: Bad servo glitching question
Your best bet on testing the RX is to find someone that has a transmitter on the same frequency that will work with it. The kind of interference you're describing sounds like something faulty in the transmitter, operating the radio in 0 or bellow weather may be causing condensation inside the case once things heat up (the power amplifier gets pretty warm) so try it in a warm environement after it's had time to reach the warm area's tempature (like 2-3 hours after you bring it inside) and see if you can get the problem to happen again.