--- Bill Bradford <mrbill(a)mrbill.net> wrote: I don't have one in front of me, but ISTR that just the CPU with a full boat of RAM, not including any external BA-11s, disks, etc, pulls between 8-12A @ 110VAC. The mains is a 30A Twist-n-Lok connector, in case you don't have one already wired-in at home (I do! ;-) I wouldn't be surprised if half the power went to the blower. Filling the internal Unibus would, of course, raise the bar somewhat, at about 50-100W per board, I think. Nice machines. If you are lucky, they've been upgraded to take 14Mb of RAM. I only have 8Mb in mine. :-( It originally shipped with 512Kb and I did the upgrade myself when my employer used to own it (extra backplane wires, flip some switches on the CPU ID DIP pack (another post-factory upgrade!) and replace the mem controller). I think they are a good compromise between size and speed if you need PDP-11 compatibility mode. The 11/730 has a "real" console (the 11/750 runs out of its own ROM; it does not have a micro as a console processor and, therefore, does not require console media to start up (but there was a microcode patch late in life that may or may not be needed before the OS boots up, so some 11/750s *did* have a start-up TU-58)), but is about 50% as fast as an 11/750. Everything larger than an 11/750 is faster, but harder to move and sucks more power. If you are going to run one of them on a regular basis, you might want to check first, to see what boot ROMs are on it, since unlike the 11/730 and 11/780, does have them. Really old 11/750s might not have an MSCP boot. Ours did not (it shipped with RK07sand was originally fitted with a Systems Industries SI9900 SMD controller; it didn't see an RA81 until it was six or seven years old). The other thing to see is what MASSBUS cards are in it. You might find just a MASSBUS card for disk and tape (we had RM02s (for emergency purposes) and a TU78), an SI 9900 card (2 x 40-pin Berg connectors on the I/O panel), or even a second Unibus controller (DWBUA). We always had all the MASSBUS slots populated, it just depended on what year it was as to what was where. A 32-bit path to disk was great back in those days. -ethan ===== Visit "The Seventh Continent" http://penguincentral.com/penguincentral.html __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger http://phonecard.yahoo.com/