I had this problem when I switched over from a stock sc10 steering servo to an airtronics 94357. The the amp draw from the 94357 was taxing the BEC from my sidewinder ESC. It would essentially cut off the receiver and it would take a second or two for the receiver (SR3001) to re-bind with the radio and all was well. Here was the solution to my problem, a voltage protector like the one on this link, or I made one myself with an old GTX power capacitor. If you make your own, it will need to be rated at 10volts and above and at least 3300uf.

http://www.amainhobbies.com/product_...tage-Protector

Hope this helps you.