Go with what Tim C. said. I think we have not ruled out that it is the Airtronics RX. If you use another brand (ie:hitec , JR or Futaba) then we can isolate the problem more clearly. Which ones do I use? MOstly Channel 36 but I also have Channel 42 and 17. I think you are having a elec. current prolbem and that means it need to be serviced.