Small DEC QBUS backplane

Chris Zach cz at
Sat Jan 30 15:14:47 CST 2021

Hm. I have a 9 slot BA11-S that I have to sell/ebay/something here, but 
that's probably way too big for you. I wonder though: Would an 11/93 
explode if put in a traditional 18 bit 11/03 chassis? The one with the 
memory refresh lines and power for core memory.



On 1/30/2021 12:30 PM, Nigel Johnson via cctalk wrote:
> I'm trying to repair an LSI-11/93 that has a bus timeout problem.
> Unfortunately the BA23 box it normally sits in lives in a cupboard with
> printers stowed on top of it and due to my domestic situation (small
> condo) I can't get it out to scope or get a scope anywhere near it to
> scope the bus.
> I'm thinking that the solution would be to get a small QBUS backplane
> that I can put on my desk in the middle of my test equipment.
> Like a 4-slot ABAB oir even ABCD would do.
> Does anybody have one they don't want?  Power supply not needed.
> cheers,
> Nigel

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