Very clever solution, but one question: Do all four of the ground pins actually need to be connected from the cap to the board? The only reason I can see for that is if Tek used the caps to hook separate ground runs together.
.. and that is exactly what is happening on the rectifier board in the 76x3 scope. The cap is used to bridge 2 parts of a ground plane together so that a track may run underneath. I have seen other repairs where wire links were installed to make the bridge. I think the PCB solution looks neater
Ah hah, gotcha! I figured that must be what's going on; just wanted to make sure. Does look a ton nicer!
You know, I recently opened a small triple output HP power supply from 1984. It used smaller diameter versions on those 4-terminal caps, only they were 5-terminal! Two positive and three common ground terminals; they were actually two separate capacitors in one can! (One was a 1000uF/300uF, for example.)
They also used the three ground terminals to bridge two ground planes. I was actually going to make up little adapter boards just like yours; only they would have allowed you to put two capacitors on them. (In the end, all the caps tested fine, so I figured it was more trouble than it's worth.)
I think I'll have some of your PCBs made up though as they're cheap enough and it seems like I'm always fixing a TM500 series mainframe! (It's a better solution than just wedging a two lead snap in cap down. I just did a TM501 last week, and there wasn't quite enough horizontal clearance for the new cap. This would have been the ideal solution.)
What kind of pins are those you have on the bottom of the boards? They don't look like standard headers to me.
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