Hoard of elderly HPs

[Roger Plant]

The reason I kept them was to control a planned wind-solar-hydro power system, I don't know if that will ever get built but they would be ideal to control it.
I have not accessed them for about 15 years and can't remember all the details.
I used to use them extensively for CAD purposes in the 1980s-90s so know their capabilities well.
I know I have at least one of each computer type plus extender(s?) and relay I/O modules. (16 or 32 channel?)
They were all working when stored but I expect the 9825 DC100 tape drive will need some tlc to its rubber tape drive pinch wheel.
I can't remember if I have one or two 9825s certainly one 9825 and maybe a 9825B.
IIRC the 9826 had a display fault that gave some random lines on the screen.
That one is certainly surplus to my requirements and not expensive to a good home, if some one knows how to fix that minor fault.
Please excuse my forgetting all the HP part numbers, it's been a long time since I put them into storage.
I do know they have an internal 24 volt powered SW mode psu and I was running the 9836 on 24 volts DC.
I know they are very useful for machine control purposes so they would be very useful and easy for me to program in HPL and use for that.
I am not going to give them away cheap.
BTW HPL runs much quicker than basic on them, about 16 times faster when I tested it. Not sure if that was Rocky Mountain Basic or not.