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Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Clean it with flux and steel wool, then buy a nice shiny brass bolt, cut the head off and grind the all-thread flat and perpendicular/square, then solder that Brass all-thread to that round bit. then insulate it as you prefer.
Registered Member #3447
Joined: Fri Nov 26 2010, 11:10PM
Location: North Jersey
Posts: 97
Taking Patrick's advice, I went with a brass machine screw (1/4-20) and silver conductive epoxy. First, I used lemon juice and salt (1:1 vol.) to clean off the oxidation and corrosion. I used a plastic tape core that was exactly 1" diameter and 1/2" tall as a form. Later I will pot the whole top in white marine epoxy.
Registered Member #3447
Joined: Fri Nov 26 2010, 11:10PM
Location: North Jersey
Posts: 97
I measured the same resistance before the retrofit from one side of the shiny plate to the other side and from the nipple to the plate. I did discover during the cleaning that the nipple had been soldered to the copper plate.
As I mentioned, this is only a filter cap that will have a ripple less than 2%. That's 400 volts variation at 20kVDC. I can't imagine that causing any trouble. But perhaps I'm not sufficiently clever to see the rub.
The only restriction I can imagine related to this resistance is the heat affecting the epoxy.
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Large Capacitor Connector
