On 1/1/22 10:40 AM, Paul Koning via cctalk wrote:
On Jan 1, 2022, at 1:12 PM, Noel Chiappa via cctalk <cctalk@classiccmp.org> wrote: This: https://www.ebay.com/itm/275084268137 The starting price is expensive, but probably not utterly unreasonable, given that: - the 780 was the first VAX, and thus historically important - 780's are incredibly rare; this is the first one I recall seeing for sale in the classic computer era (versus several -11/70's, /40s, etc) - this one appears to be reasonably complete; no idea if all the key CPU boards are included, but it's things like the backplane, etc (all of which seem to be there) which would be completely impossible to find now - if any boards _are_ missing, there's at least the _hope_ that they can be located (780 boards seem to come by every so often on eBait), since people seem to keep boards, not realizing that without the other bits they are uselessInteresting, but the argument for why it's not tested is implausible which makes me very suspicious. I suppose there might be a few American homes that have only 110 volt power, but I'm hard pressed to think of any I have ever seen, and that includes really old houses.
Without replacing the power controller in the 11/780, you need 208v 3-phase to run it. It's not impossible...nothing in the CPU actually *needs* 3-phase as the individual power supplies are 120v but the overall maximum load is greater than a 30A 120v circuit.
TTFN - Guy
