After reading through this thread I noticed that nobody has mentioned pointing the TX antenna directly at the model. The TX antenna has a blind "cone of confusion" projecting outward in the direction it's pointing. Most of the time your plane flies through this cone with no problem, but in a low-and-fast condition the momentary loss of signal from the TX is bad. I try never to face my airplane when in the air...always look to the side at it, or angle the DX-7 antenna straight up and then don't fly directly overhead.

Yak