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Type: Posts; User: Roland Huisman

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  1. Replies
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    Please read what I write... The 8/L itself is...

    Please read what I write... The 8/L itself is limited to 4K. You can't add more memory in the machine itself.
    That memory expansion box is probably tenfold rarer than a PDP8/L. That is why I'm...
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    I do the same when I'm searching for a machine......

    I do the same when I'm searching for a machine... When you don't ask, nobody knows...



    Remember that an 8/i needs a H960 rack. It is not a machine which you can easily put on your desk...
    The...
  3. The last CRT rebuilder was RACS in France. They...

    The last CRT rebuilder was RACS in France. They quitted a few years back.
    I knew them from my vintage television hobby. Rebuilding the really old CRT's was quite expensive.
    Especially the round...
  4. The sound that you are hearing is EHT sparking...

    The sound that you are hearing is EHT sparking probably inside that tube because it is not vacuum anymore. Swapping a CRT from a donor is not hard to do. But it is important that you pull of that...
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    Hi Volker, Well I think you are not the...

    Hi Volker,



    Well I think you are not the only one with a bunch of these drives which need to be restored.
    That is why I want to make something easy to built for others. Another part of my plan...
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    RK05 disk drive versions

    Last Friday I've picked up these lovely little RK05 drives... There are some differences between them.
    There are two RK05 drives and two RK05J drives.

    One of the RK05 -seems- to be converted to...
  7. PDP11/05 PDP11/10 CPU board set revision compatibility

    I have a bunch of these PDP11/05 /10 CPU boards to repair. But there are several different board revisions.
    Do all 7260 boards work with all 7261 boards? Or is there a list of which board revisions...
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    Now that is a beautiful museum! I love the 3D...

    Now that is a beautiful museum! I love the 3D pictures!
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    Congratulations! :D

    Congratulations! :D
  10. Hi Monty, Not yet because I'm a bit too busy...

    Hi Monty,

    Not yet because I'm a bit too busy at the moment making some space here. Clearing out a lot of stuff which is not my core collection. There is about 450 kilogram of old computer iron...
  11. Hi Jos, Nice project! Count me in for one :D ...

    Hi Jos, Nice project! Count me in for one :D

    Regards, Roland
  12. The drifting G2 voltage was exactly what I was...

    The drifting G2 voltage was exactly what I was afraid for in the first place...
    The regulator for the G2 voltage (SCREEN) is on the line output transformer.
    (The other one is the focus)

    You...
  13. On page 100 you can see the CRT. G2 must be...

    On page 100 you can see the CRT. G2 must be 275Vdc. Interesting to see what it does with the error en what it does at normal brightness.
    The same is for the G1. Don't adjust anything while the error...
  14. Well it would be interesting to see what's...

    Well it would be interesting to see what's happening on the G1 and G2 voltage on the CRT when you see the brightness difference.
    The problem here is that you need a voltmeter which has a high input...
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    Very nice, I've saved the pictures. Too bad that...

    Very nice, I've saved the pictures. Too bad that there was no backplane with it.



    Very nice! Can you share some pictures of this board? Would love to see it.

    Regards, Roland
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    Hi Ed, Thanks. It is a beauty but I'm looking...

    Hi Ed,

    Thanks. It is a beauty but I'm looking for a backplane which fits in the machine.
    The MM11E is like the picture in my first post. It has boards in slot (B)C-F only.
    To be honest I...
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    Hi Ed, I'm searching the backplane and...

    Hi Ed,

    I'm searching the backplane and boards.
    No problem if it is defective...

    Regards, Roland
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    MM11-E or MM11-F (wanted)

    I'm searching for a MM11-E or MM11-F core memory module.
    Would be great if anyone could help me to get one.

    64169

    But I was also wondering if DEC or a third party made a quad board alternative...
  19. Nice work! 😊

    Nice work! 😊
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    An 8/M or 8/F panel will work in a 8/E indeed....

    An 8/M or 8/F panel will work in a 8/E indeed. But I know there are some minor differences in front panel hole positions. Be careful.
    The 8/E panel will not work in an 8/M or 8/F without...
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    I'm interested in the panel. Any price idea? ...

    I'm interested in the panel. Any price idea?

    Original the PDP8/E had incandescent lamps. The PDP8/M and PDP8/F had LED's.
    But many PDP8/E machines were converted to LED later. Mine as well...
    ...
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    Nice terminal! I was wondering the same. I...

    Nice terminal!



    I was wondering the same. I have some nice pictures of some CDC terminals.

    Regards, Roland
  23. This comes from the crt rubber which is aging... ...

    This comes from the crt rubber which is aging...

    This stuff turns in some sort of oil while decaying.

    64042 64043
  24. Hi Jos, that would be very nice!

    Hi Jos, that would be very nice!
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    I've got the tapes now for my 4052. Off course...

    I've got the tapes now for my 4052. Off course all the tapes have a broken belt...

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