> -----Original Message----- > From: cctalk [mailto:[email protected]] On Behalf Of Noel > Chiappa > Sent: 09 February 2016 16:27 > To: [email protected] > Cc: [email protected] > Subject: Re: 11/73 into 11/03 chassis? > > > From: Jacob Ritorto > > > Can I tear apart my little BA23 .. and put the Micro/PDP-11 backplane > > .. into the spot that my 11/03 backplane currently occupies and run it > > via the (working) stock 11/03 power supply? > > ... > > Specifically, would I have to butcher power and clock lines to do this, > > or is it all plug compatible? > > I'm not absolutely sure exactly what you have that's holding the '11/03 > backplane'; if it's a standard BA11-M enclosure, the answer, sadly, is 'no'. > > The BA-23 uses the H9278-A backplane and H7864 power supply; the BA11-M > uses the H9270-A and H780 backplane. The power connections between the > first two are completely different from the latter pair; the first uses a long, > single-width Molex-type connector, the latter uses bare wire ends to a > terminal block on the backplane. > > Also, the H9270-A is a four-slot backplane, and the H9278-A (an eight-slot) > almost certainly will not physically fit into the space for the former. > > If your '11/03 backplane' is a different kind of backplane, in some other kind > of box (e.g. BA11-N or BA11-S), the answer, sadly, is still 'no', because they > both also use terminal blocks for power. (Although if you have a BA11-S, > you'd already be set, those are Q22 native.) > > Really, it's not that hard to upgrade an H9270-A (or the H9273-A in a BA11-N) > to Q22 (I have done several of the latter); the transplant you speak of (were > it possible) is on the same order of magnitude of work. > > Noel > > PS: In dragging my BA23 out to look at it, it dawned on me that I will probably > never, ever use it - I now have several BA11-N/S boxes, and prefer them. (I > don't need to run the later disks that need the BA23.) So if someone is > interested in the either the BA23, or the spare H7864 I have for it, please let > me know. I'll let either go for my original cost plus shipping.
Is this in the USA? Regards Rob
