IBM PCjr Power Supplies

From: PDP11 Hacker ..... <ard_at_siva.bris.ac.uk>
Date: Sun Jul 27 16:08:15 1997

>A while ago I promised two people that I would fetch them some IBM PCjr
>power supplies if I ever found them. Well, I found some today. I've got

Incidentally, I built a PSU for my PC-jr last week.

I used a simple 15V AC transformer, no centre tap or anything like that. The
only one I could find was 50VA, which is marginal, but not too bad.

The ends of the secondary go to the outside 2 pins of the PC-jr power
connector. The central pin goes to mains earth and to nothing on the secondary
side at all.

Oh, I put a 3.15A fuse in series with the secondary to protect the transformer.

It works fine. My PC-jr boots, and all PSU outputs (including the -ve one) are
present and correct.

>
>Sam

-tony
Received on Sun Jul 27 1997 - 16:08:15 BST