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PDP-8’s for sale
I’ve decided to sell of a few PDP-8’s as the hoard is getting rather large at the moment and so I’m prepared to part with the following:
PDP-8/M, 8KW core, M8650 serial UART, very clean machine in working order. This machine is currently listed on ebay here: http://www.ebay.co.uk/itm/ws/eBayISAPI.dll?ViewItem&item=320762438517&ssPageName=STRK:MESE:IT
PDP-8/E, 4KW core, M8650 UART, requires a full rebuild
PDP-8/A,… »
Recent Sales
A few PDP-8s have come up recently on Ebay. Here is a summary of the highlights:
PDP-8/L
This PDP had lived its last 30 years on a barn, although the pictures don’t look too bad. Internally very clean and looks like it has a complete set of cards including memory. The outside is not so pretty much… »
PDP-8/M (number 2) returns to life
My second PDP-8/M is just about back in the land of the living. I followed largely the same process as with the restoration of my first 8/M. Luckily this examples case wasn’t corroded and so I didn’t bother respraying and left it in original condition.
The main sticking point with getting this machine back was a… »
Latest Haul – Saved from Scrap
I’ve just taken possession of a great haul which was literally sat on a scrap heap ready to go to PDP heaven. Highlights of the find include most of a PDP-8/M, a PC04 paper tape drive, a TD8E simple DECtape controller, an ASR-33 and a H960 rack. Whilst pretty rusty having lived in a barn… »
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Recent sales
Here is a review of recent known PDP-8 sales. As ever, prices appear to be heading upwards. Join Discussion
PDP-8/M Rebuild – part 4 – Reassembly and first power up
Having reinstalled the power supply into the chassis, the console was put back into slot 1 and carefully reassembled.
The minimum board set was then installed consisting of:
Slot2: M8330 KK8-E timings
Slot3: M8300 KK8-E major registers
Slot4: M8310 KK8-E major register control
Slot 20: M8320 KK8-E bus loads
The machine was then powered on and LEDs on the console sprung… »
Join DiscussionPDP-8/M Rebuild – part 3 – The Power Supply
The PDP-8/M uses a H740 switch mode power supply that provides +15V @ 1A, +5V @ 17A, -15V @ 5A together with LTC-L, PWR OK L, PWK OK EN, AC LO L, and DC LO L signals (it should be noted that not all of these signals are used within the PDP-8M). This power supply… »
Join DiscussionPDP-8/M Rebuild – part 2 – Chassis repaint
The chassis had all internal components removed (after carefully photographing everything to aid in reassembly) before being sanded down. Any areas of rust were sanded back to bare metal.
Unfortunately I could not persuade the build label to come off of the chassis cleanly so this had to be sacraficed. Before I removed it I carefully… »
PDP-8/M Rebuild – part 1 – Initial Inspection
I’ve finally decided to bite the bullet and start the rebuilt of one of my OMNIBUS PDP-8s. I decided to start with the more challenging of the two using the theory that by tackling the worst I would be much better prepared for a simple rebuild of better condition machine.
An appraisel of the machine
Before commencing,… »
VIDEO: PDP8/M in action on YouTube
Its always good to see a PDP-8 in action, if nothing else to inspire us to get on with our own rebuilds. During my web travels, I came across this nice little video here of a PDP8/M running a demo program.
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