Hi Michael,
You know, I've just been looking at that and you could be right, but I *really* can't tell how those connections were made!
Comparing it with the apparently identical one on the old board I would say there is a bit missing entirely! Without taking the second one apart I can't be 100% sure, but it looks to have a fairly solid silvery/gold film extending to the pcb pins that are staked through the paxolin with what could be a varnish of some sort applied over the top. There is not the faintest trace of anything like that on the failed part, nor the slightest trace of any residue whatsoever, it looks like pristine paxolin substrate with an intact resisistive film applied to it and no means of connection at all - very, very odd!
If it was open circuit all along why did things only go berserk when I turned the pot? Floaty HF at several kV with assorted capacitors around went unstable when screwdriver approached perhaps? Not convinced!
I have some Piher parts on the way that look like they'll fit nicely and we'll see what happens when they arrive.
Best,
Adrian
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On 7/28/2018 11:32 PM, Michael A. Terrell wrote:
Did that pot have a short trace of silver between the end of the resistor to the terminals?
