I always pull the plugs on my PDP-11s, because the small transformer in the power controller is always connected. I once heard a story about a transformer that developed a short-circuit in a winding, and the thing got hot ... Actually, I don't pull the plugs. In my little museum it is too much hassle to get to the plugs on the wall behind the racks. I have six resettable 230VAC/16A. fuses which I turn off when I am not in the "computer room". - Henk, PA8PDP. This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.