I recently started to resurect an old Goldburg Electra for my 14 year old to learn to fly on. I had previously used an old Futaba Conquest 4 channel and it was fine on the Robbe 620 BEC. I have siince sold that unit and was planning on using an old Futaba Gold case 6 channel. When I install it, the servos work OK but the throttle is inactive. If you plug and unplug the BEC reciever connect for the throttle, the motor will run for several seconds and stop. Just for laughs I connected my JR8103 and a reciever to the throttle connector and the throttle action was as normal. What am I missing here? Is there possibly a difference in Futaba transmitters on the the throttle side? I wouldn't expect so but this is weird! I also tried to reverse the servo on throttle. Interestingly I found that if I plugged the throttle connector from the BEC into channel 7, I had throttle control using the thumbwheel switch for aux channel. Any thoughts would be appreciated.