3 Oct
1998
3 Oct
'98
7:22 p.m.
Zane H. Healy wrote:
If it isn't one problem it's another. Last
night I left the PDP-11/23+
(still haven't gotten it to work with a /73 CPU board) running for about 4
hours to see how it handled being left on. The only thing running was
"show mem" on the console since I was working on some other stuff.
Jerome Fine replies:
I agree that this is a valid way to test a "new" system.
Much to my terror/irritation, about 10pm I noticed a
buzzing or sparking
sound. I quickly moved it away from the sofa, and started investigating.
It sounds as if something in the area where you've got the breaker and the
powercord plugs in is 'arcing and sparking'. I've got to take off in a
little while, but I plan on looking into this later this afternoon or
tonite.
I also lost the power supply on 2 BA123s in the past, but it seems
that it was the capacitors which rectify the DC output.
Unfortunatly I don't have any docs on the BA123
(just the BA23), so will be
having a fun time figuring out how to get it apart.
The whole power supply comes out if you unlock 4 bolts holding the
power supply in place and also disconnect the cables at the front.
Opening the box is only a little more difficult. I did so without any
specs.
My problem is that I have neither the equipment nor the inclination
to fix a power supply from either dead one from the BA123. I offered
both of them before, likely for local pickup only since they are
very heavy and I also don't have any boxes to package them.
Is there anyone who wants a spare (but not unfixable) power
supply for a BA123. I will even through in one backplane box
as well, but the wheels have been removed.
Sincerely yours,
Jerome Fine
RT-11/TSX-PLUS User/Addict
Year 2000 Solutions for Currently Running RT-11 Applications
(Sources not always required)