I think the main difference is the H7420, which is the newer of the two, can handle more current.
On Sun, May 15, 2016 at 3:02 PM, william degnan <[email protected]> wrote: > I may have mentioned here that I have a PDP 11/40 with a DEC H742a and > another with a h7420a power supply. The boards and configurations differ, > but they seem to be functionally alike. Anyone have a second opinion? I > have been treating them as if they are interchangeable. > Bill > > -- > @ BillDeg: > Web: vintagecomputer.net > Twitter: @billdeg <https://twitter.com/billdeg> > Youtube: @billdeg <https://www.youtube.com/user/billdeg> > Unauthorized Bio <http://www.vintagecomputer.net/readme.cfm> >
