The DD11-PK is used only on the 11/04 and 11/34. The 11/05 had 4 dedicated backplanes to use. Pick the one you want to match the configuration you need.
Paul On Sat, Oct 21, 2023 at 11:42 AM Chris Zach via cctalk < cctalk@classiccmp.org> wrote: > Interesting. Would a DD11-PK be usable as a normal Unibus/SPC backplane > for a 11/05? I do need one but I'm not sure if the PK has a true "Unibus > in" on say slot 2 that I could put a jumper into from the 11/05's > backplane. > > Anyone know? > C > > On 10/21/2023 12:16 PM, Jon Elson via cctalk wrote: > > On 10/20/23 11:46, Ethan Dicks via cctalk wrote: > >> On Fri, Oct 20, 2023 at 12:11 PM Jon Elson via cctalk > >> <cctalk@classiccmp.org> wrote: > >>> On 10/20/23 03:59, Michael Thompson via cctalk wrote: > >>>> The RICM has an empty 11/20 chassis and the power supply. All it > >>>> needs is > >>>> the processor backplanes. Is there any chance you have a set of > >>>> backplanes > >>>> available? > >>>> > >>> I have a DD11-PK backplane (Part No. 70-11523) with a few > >>> bent pins. None are bent so badly they can't be > >>> straightened. From 11/04 or 11/34. Free if you pay shipping. > >> DD11-PK is for 11/34 (top two slots for CPU). PDP-11/04 uses standard > >> DD11-DK (single-board CPU, doesn't need special slots). > >> > >> The 11/20 is entirely different. It has three 4-slot backplanes for > >> CPU boards with "random" wiring and Unibus out on AB of final slot. > >> > > Right. I was just noting that I had this backplane available, if > > anyone needed it. > > > > Jon > > >
