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  1. Replies
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    PM sent to Gary C as I've not been able to prove...

    PM sent to Gary C as I've not been able to prove if the transformer is faulty so swapping for another one will eliminate it.
  2. 2nd card up on right looks like an MXV11, two...

    2nd card up on right looks like an MXV11, two serial ports, some boot ROM's and a little memory. I have one in my LSI-11/02.
  3. Nice haul, be careful you have a mix of Qbus ands...

    Nice haul, be careful you have a mix of Qbus ands Unibus cards in the photos above. You can damage the cards if they are not put into a correct slot. so my advice would be to list the Mxxx numbers on...
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    @DAve G4UGM, I checked out groups.IO and found...

    @DAve G4UGM, I checked out groups.IO and found that I was already a member..doh!!. I've just replied to a post from earlier this year about a PDP-11 with VT320's.
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    Thanks for the info, I doubt I'll get time to...

    Thanks for the info, I doubt I'll get time to work on this over the weekend now. My real job has taken over :( @Gary C, Glad you have made progress. I may take you up on the offer if I find my...
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    pics of transformer610446104561046

    pics of transformer610446104561046
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    Hi Dave, I'm Paul.:) I've removed and cleaned the...

    Hi Dave, I'm Paul.:) I've removed and cleaned the circuit board. I found the top of transformer T802 inside the terminal. Not 100% sure if this transformer has blew. I'll remove it from PCB at the...
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    Thanks wupf and Qbus, great we now have a...

    Thanks wupf and Qbus, great we now have a diagram:D. I have some experience fixing monitors (Zentec, Redifon, Newbury Data and Wyse mainly), albeit it 25 years ago. I will in this instance make all...
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    Thanks both, I have also asked on a couple of DEC...

    Thanks both, I have also asked on a couple of DEC Facebook groups. No joy yet. @Gary, you will find in the service guide a description of each potentiometer function on the circuit board. You may be...
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    VT420 troubleshooting

    Does anybody have experience troubleshooting a VT420? I have one that does not display on screen when powered up but makes a continuous clicking sound (switch mode startup?). I have the service...
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    Very Cool:)

    Very Cool:)
  12. My early PC and DOS skills are rusty but if I...

    My early PC and DOS skills are rusty but if I remember correctly to use memory above 640K himem.sys needs to be loaded and to put DOS in that memory DOS=HIGH needs to be configured in config.sys.
  13. Didn't spot it......I was thinking it maybe if...

    Didn't spot it......I was thinking it maybe if what I think is a CD-ROM drive in the background was DEC branded (and that doesn't even look like a CD-ROM now that I've looked again)! good luck with...
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    It could also mean that the pin is sticking in...

    It could also mean that the pin is sticking in the printhead due to dried up ink or dirt. Worth inspecting the printhead also.
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    Now that i have a lot of downtime I took the...

    Now that i have a lot of downtime I took the Rainbow out again to troubleshoot the K/B error. I had ordered some likely candidate IC's a while back so thought it is time to get the soldering iron and...
  16. Thread: DEC Rainbow 100+

    by PG31
    Replies
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    Now that i have a lot of downtime I took the...

    Now that i have a lot of downtime I took the Rainbow out again to troubleshoot the K/B error. I had ordered some likely candidate IC's a while back so thought it is time to get the soldering iron and...
  17. PM sent:)

    PM sent:)
  18. HP1000 A900 plus spare board set and cables etc

    I have a HP1000 A900 complete working with two HP-IB I'F's and cables, two 8 port async mux with cables and breakout boards (connect console to port 0 on here). Sale comes with a complete spare...
  19. Thread: desktop LSI-11

    by PG31
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    There is also the original DEC BA11-VA, i have...

    There is also the original DEC BA11-VA, i have one of these with a 11/02 CPU booting from a SCSI card and SCSI2SD. Very neat little box. 583955839658397
  20. Is the disk manufactured by Data Disc Inc or...

    Is the disk manufactured by Data Disc Inc or possibly Scientific control corp?
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    Hmmm, i used a guitar string to remove the plate...

    Hmmm, i used a guitar string to remove the plate glass and then a new craft knife blade to clean off the excess "glue" left behind. I re attached the plate glass with double sided scotch pads, two on...
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    Not convinced, ;) It doesn't look like the quad...

    Not convinced, ;) It doesn't look like the quad board goes all the way to the edge. The measurex board does look very similar to a quad QBUS card.

    57152
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    I don't think that is QBUs, the two parallel...

    I don't think that is QBUs, the two parallel metal bars would prevent QBUS cards being inserted, it certainly looks that way to me from the photo.
  24. Thread: LK201 Keybaord

    by PG31
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    The eight keyboards arrived today, 3 are...

    The eight keyboards arrived today, 3 are 70-23983-EE D01 and five are 70-23983-PE. If I'm correct the 70-23983-PE C01 are known as gold key keyboards and are for word processing, the numeric pad has...
  25. Thread: LK201 Keybaord

    by PG31
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    Thanks for replies, I will check for APL keys and...

    Thanks for replies, I will check for APL keys and I will definitely have some spares. I won't need eight. I'm not sure even if they are all EE variant only the one I've seen. I'll update when they...
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