I was think more of damage to the power supply caused by shorting it out, or possible damage to the pre-amp. I use switches (containing semiconductor devices) in a satellite system, and they are very sensitive to being damaged through being disconnected whilst being powered. Pre-amps are probably less sensitive, but some of them are expensive enough to not to want to take a chance!Be sure to disconnect the power supply again before you reconnect the RG6 to the pre-amp (and don't forget to plug it in again afterwards!).
DXer, I know I didn't do this on many attempts at moving and reconnecting the RG6 to the pre-amp - silly question but, what is the danger there? I'm not technically inclined!
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