[R-390] Power Supply Module caps

[Barry]

> I did the capacitor "re-stuff" for the R-390A
> What a PAIN!
> Cut them open and clean out the gunk..
> Drill and tap the aluminum..
> find small brass screws and screw them in....
> Tin, solder and install the new capacitors....
> JB Weld the whole mess back together....
> 
> Jim

Agreed.  The GR1617A had some bad filter caps and I rebuilt all 7 of them while I was in there.  Not fun.  I think I would have been better off (in this case at least) designing a small circuit board with all the caps on that and wiring it in in place of the twist-locks.

BTW, I opened these by removing the crimp at the bottom end and pulling the guts out, fiber plates and all.  I relieved the insulating plates just a bit (making them effectively thinner), reinserted them with the new caps installed, and recrimped the end.  Makes for no need to glue them back together.

One caveat if you try this: be careful to get the end plates back in at the same depth all around.  If not, the cap will sit crooked.  I have a couple that did that so the row of 7 caps looks a bit snaggletoothed in places.  It works, though.

Barry - N4BUQ