I hadn't thought about temperature related issues since the dark old days of analog C band. I do remember a warmup time being needed before they'd settle down. My sat receivers were rack mounted with separate, stand alone, power supplies for the LNB's. I was feeding the sat receivers IF outputs into a pair of Icom R7000 radio receivers. Frequency drift was very noticeable with what I was doing with that setup.

I was lucky enough to never live where you had to keep them powered up to prevent them from actually freezing though.

I owned several that would occasionally need "encouragement" in the form of a few sharp, but not too sharp, raps to shift polarity though.

I would have imagined that alll of these issues would have totally disappeared ages ago as the designs matured. I've never experienced any of these issues with the Ku band gear I now play with. I guess that most people will never fully appreciate just how much technology is crammed into that modern mass produced six dollar LNB.

thanks,

FMW