That is really weird. Is this a new power panel??? A thought would be that the power panel is creating some kind of radio interference, but even if it was the radio should function after the panel is depowered. The whining I cannot explain, electric whine, ie high pitched tone, happens with high voltages, a lot higher than 1.5v or 12v, this happens at like 10,000v. Another thing that doesn't make sense is that the current going to the plug is DC, meaning that there should be no voltage oscillations. So even if your glow plug wire crossed the receiver antenna it shouldn't make the servos jitter back and forth, this is a sign of oscillating interference. In car audio, the power cable that goes to the amp, is kept as far away as the signal cable because the alternater generates "whine" proportional to the engine speed that the signal cable can pick up and amplify. But since you are running from a battery, and not an alternator, or a switched power source i'm assuming, then there should be no oscillating interference what so ever coming from the ignitor, unless your electronics in the panel have gone haywire. What is really odd about this is that you say the radio jitters like crazy without the plug even attached to the ignitor, without the plug attached no current will flow, if there is no current then there is no electromagnetic interference being created by the wire to the ignitor. Try opening up your RX and servos and let them sit open on a towel for a day or two, this will eliminate them in the problem, it's possible there is corrosion, check this, unlikely a bad solder job, but check this as well, make sure your crystals are in tight!!!!. Once i brought my boat in for a fuel up, i can fuel mine while letting the engines run, and put it up on the table and put the TX next to it, i guess the vibration made the TX crystal come out, wow, the engines went nuts on me and the rudders were all over the place, at first i thought this might happen if the batteries were dying, this was after about an hour of running, but then i saw the crystal on the table, popped her back in and all was good. So you might have some corrosion at the connection to the TX or RX crystal. I now have a piece of electrical tape over my RX to hold the crystal tight for sure and duct tape on the TX. Goodluck