[R-390] R390

[Mike Jones]

Thought I'd throw an email out for a question. I'm new to the Collins line, I do own several boat anchors,  and wonder what is considered the best way to run an R390? I have heard, leave it on 24/7, ovens off, don't let it sit on one set of coils, frequency, when I'm not listening to it, shut it off........etc. What kinds of experience have any of you had that works? 

Thanks in advance!
Mike
KD0KCM