If you wanted a new supply that's not likely to fail any time soon, you can get lots
of 5v/24v/-12v or 5v/24v/-15v supplies from Jameco for around $50. If the manual is
correct (page 19), you can use the -12v/-15v with some jumpering. If you wanted to play
it safe and not jumper it, you could always drop (raise?) the -12v/-15v to -5v with a
7905; it uses 0.1A max, so you'd probably at least want a small heatsink (you'll
be burning 0.7W/1W), but nothing too huge.
Power supplies (all can handle the spec'ed 1.7A on +24v):
http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_2103206…
http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_323812_…
http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_132371_…
- Dave
On Jan 12, 2012, at 12:00 PM, jim s wrote:
ebay auction for open frame supply for 2/3 of the
voltages: 140670971601 +5 at 5a +24 at 4a.
Getting the -5 is only necessary on an 800L I noticed in the manual, do you have an
800L?
I recall that not all 5v supplies at the time were happy in a system supplying as -5, but
I don't recall how to tell which you needed. I think that would take some research to
figure out from the type of power supply. Also there are implications with the AC in and
grounding which come into play. It was always nice to find the triple output supplies
and not have to deal with a separate -5 supply.
Jim
On 1/12/2012 7:26 AM, jim s wrote:
> There were power "bricks" with all of the DC voltages made at one time. +
and -- 5 and 24v was a popular item at the swap meets.
>
> It does have an ac motor, and there were at one time parts to change to 50 hz. I
don't recall if the voltage problem is strappable, or has to be handled externally
with a stepdown. Never worked with the floppies, only with SMD drives at 50hz for
export.
>
> Jim
>