https://www.rapidonline.com/assmann-wsw-a-20141-6-pin-rj12-socket-black-50-1451 Not an MMJ socket, but a cousin - the key is central not offset, and perhaps a different footprint / orientation (but not all that is available) - something like this might match the PCB footprint, but require retermination of the console cable - alternatively it could donate a new contact pin, doubtless a horror to fit
Martin -----Original Message----- From: Antonio Carlini via cctalk [mailto:[email protected]] Sent: 21 March 2024 22:59 To: Jonathan Stone <[email protected]>; [email protected] Cc: General Discussion: On-Topic and Off-Topic Posts <[email protected]>; Antonio Carlini <[email protected]> Subject: [cctalk] Re: VAX 4000 console SLU in need of some TLC On 21/03/2024 22:03, Jonathan Stone wrote: > What kind of VAX 4000? One with DSSI connectors on the "S:U", or the > /VAX 4000-200/KA660, which has serial and Ethernet? IIRC you can > klludge up the latter using a KA630 SLU, and either re-using the > AUI/10base-2 part of the SLU, > or kludging one from a DEQNA/DELQA to act like the AUI-select switch > setting and AUI of the original Those come off the KA660 in a single > IDC connector, 50 pin if memory serves. > > I have no idea about substituting for DSSI. It's a VAX 4000-300 (KA670) in a BA440, so it has two DSSI, ethernet, the usual switches and LED display. I can switch ethernet between AUI and BNC (the green LEDs change) and I have known working DETPM AUI<->RJ45 interfaces, so ethernet may be OK. I have found one panel for a KA650 (uV 3500/3600) that has an OK connector but is otherwise a bit toasty, so I'll try carefully removing that tomorrow. If that goes OK, then I'll remove the MMJ socket from the VAX 4000 console SLU: it's dead so there's not really much risk here as long as I'm careful with the PCB. At least I could then tack on 6 wires and find a way of interfacing. I do have at least one H8584-AC, which is an MMJ socket and an RJ45 plug. So with a bit of measuring I could probably find an RJ45 socket and rig up some temporary franken-console. Or, if the KA650 donor is really too far gone, and its socket survives half a dozen cable insertion-removals with no harm, then I could just fit that in place. If the console ethernet doesn't work, I think I can drop in the DELQA with appropriate handles from the KA650 system ... I think that the BA440 Q-bus metalwork and the BA213 metalwork are compatible. If not I have one Q-bus DELQA panel and I'm sure that neither the VAX nor anything else in there with it care too much about RF interference these days! I can find new MMJ plugs all over the place (admittedly I'm assuming that Mouser and Farnell could actually supply them!!) but the corresponding sockets seem to be lost to time. Or at least they remain beyond my goolge-fu. Antonio -- Antonio Carlini [email protected]
