That could be. All will be told when I look with the scope. The bec is running on 15 volts putting out 6 volts and it's a Castle 10 amp BEC. It still could be what you say. The weird thing is it only happens on channel 3. It's like the collector on the output transistor is weak. I wish I had a schematic. No chance of that unless I decide to trace it out and I'm not that energetic. It wouldn't help anyway. I'll take a look at the BEC later.