10 Dec
2010
10 Dec
'10
9:11 p.m.
On 2010 Dec 10, at 6:44 PM, Chuck Guzis wrote:
I've got a lovely old Lambda power supply here
(linear +/-15, +/-5)
that uses an old Sprague screw-mount (Computerlytic) capacitor. It's
rated at 34000uF, 15WVDC. It's all dried out, so it needs
replacement.
It looks as if it's going to be difficult to find a working exact
replacement.
What in your experience works best in these applications? Plain old
"snap in" electrolytics? Anyone have any hints on making the
replacement fit the larger footprint?
For mounting, how about:
a) Cut out a large hole in the bottom of the can, leaving some of it
for rigidity. Remove innards. Connect and stuff the new one in wrapped
with some plastic packing to fill up the extra space. Or cut or pry
open the seam at the top if you can leave enough metal to re-attach.
b) If the old cap is actually screw-mounted by it's terminals to the
PCB, and the new cap is small enough, again cut the can, but remove the
insulated top with screw terminals (discard the can), drill 2 holes in
it, zap strap the new cap to top and remount it on the PCB.
c) Less trouble: drill 2 holes or screw down a plastic mounting to the
chassis, to zap strap the new cap to.