It's actually an ITT CANON ***2DE19P***, not a DE19 as Marc indicates. On Wed, Aug 19, 2020 at 1:48 AM Curious Marc via cctalk < cctalk@classiccmp.org> wrote:
> We had the same problem. It’s a DE-19 connector, fits in the same envelope > has a DB-9, but 3 rows instead of 2. You can see in this video right around > here: https://youtu.be/GMp5EAq-Elo?t=541 . ITT-canon used to make these. > You can look them up on eBay, which is where we found ours. Make sure you > don’t get a two row DB-19, which is a completely different animal. > Marc > > > On Aug 18, 2020, at 8:15 PM, Steve Malikoff via cctalk < > cctalk@classiccmp.org> wrote: > > > > Would anyone be able to identify the 19 pin connector used on the Alto > II keyset? > > Shown in the second photo on > https://www.computerhistory.org/collections/catalog/X124.82C > > > > The Xerox engineering doc (209962B_Alto_II_Assembly_Keyset.pdf) has it > as P/N DE51218-1 if I interpret it correctly. > > > > I've looked for a while and the closest I can find appears to be Mouser > p/n 2DEF19P > > The cost of 136 USD (each!) is more than I (and perhaps everyone else) > would really like to pay, and that's only for > > the male end. > > > > Ideally I would like a datasheet on this original connector if possible, > to know the pin-pin spacing and the pressed metal > > surround dimensions. > > > > I've just ordered small trial quantities of screws, microswitches, > e-clips, nutserts, rods and so on for my keyset > > lookalikes/workalikes. Also about to start the key mapping to F5-F9 > using a popular small SOC board, which is small enough > > to be inside a custom printed shell that the keyset plugs into. > > That is, the 3-row 19-pin female connector side which goes through to > USB. > > > > I was thinking there's no reason it shouldn't be able to work using the > original connector with a real keyset-less Alto, > > should any such animal be lurking out there. Hence looking at the > feasibility of placing in a 19 pin male-female > > connector arrangement rather than the fallback of straight-through to > USB. > > > > The whole thing is still at prototype stage so even if it doesn't work > out, well I will at least have a bunch of additions > > to my nuts/bolts/fasteners/switches stash. > > > > Thanks for any help, > > > > Steve. > > >