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    question to pdp experts - where was this used: X604 backplane, 14 Slot, 70-15140-00

    ebay has a listing https://www.ebay.com/itm/116111718118 - does anyone know where this backplane was used? I cannot find any mention of this product number
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    "simple" question for PDP 11/45 and 11/70 experts - location of memory boards

    Is it possible to put a memory board into the CPU cabinet or has all memory to be in a separate cabinet? thanks Michael
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    looking for help - DEC 3100 VAXstation power supply H7821

    Hello I have a Vaxstation 3100 with a problematic power supply H7821-00. The system run yesterday for a few hours without any problems, but now has startup issues. Instead of starting the fans, the power supply gave ticking noises. On power off the fans would spin for a few seconds and the boot...
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    Southwest VMS documentation for free

    After I received a complete set of VMS documentation a few months ago I would like to offer my own old partial collection to anyone interested. System Management 5A System Management 5B General User Vol1 General User Vol2A General User Vol3 General User Vol4 Programming Vol 2A Programming Vol...
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    debug extender cards and Unibus Edge connectors

    I recently acquired a DEC PDP 11/44. Before working on the cards I would like to get an extender card. Otherwise debugging any defect would become even more cumbersome. So 2 questions: a) does anyone have an extender card to sell? b) any ideas if it's possible to get the 36 pin edge connectors...
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    Southwest wanted - DEC M8131 module

    For a project (still a bit in the future ...) I got from ebay an M8130 and an M8132 - but was outbid on the M8131 :( maybe someone here has a module he/she would part with? thanks Michael
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    question: was there anything like an Apricot home computer sold in UK in or before summer 1983?

    Hello in 1983 I met my fate in form of a home computer in Brighton/England. I was a foreign exchange student and stayed for 3 weeks with a nice family who had a home computer I've never ever seen since. It had a shape similar to a Dragon 32, but I think it had "Apricot" printed on it. And I...
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    VaxStation 3100 memory problem

    Hello I recently acquired a VaxStation 3100 and have some issues with the memory. On boot the systems goes into a reset when doing the "B" test. After removing the 16 MB MS42-CA and only using the 4MB expander boot into console succeeds. I have now 2 questions: a) booting without a 4MB...
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    WtB Ultrix-32 system

    Looking for an Ultrix-32 system with graphic capability (decstation 3100 preferred). thanks Michael
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