Lost a plane last week. I think the last signal it got from me was full throttle at take off. It just quickly rose, turned over and then carved a ditch into the ground.

My question is: Does this sound like interference, it is not the glitchy stuff, or does this sound like receiver failure (reciever had about 30 flights)?

In a related question, there where some workman in the area, and I had heard that sometimes badly tuned Walkie Talkies will blead into the 72 spectrum. Should I avoid flying if workmen are around?

Thanks in advance for your replies,
Larry