[vcf-midatlantic] gold fing-ers
hjohnson at retrotechnology.info
Thu Apr 19 17:38:16 EDT 2018
So, I'm obtaining a recently-made PC board, which was produced by some
PC board house from Gerber files, the usual sort of small-run hobby
project. This particular board, was with ENIG plating on board and
fingers. This means, a micron-thick plating of gold over 150-200 microns
of nickel, mostly for better soldering and copper protection. But that
also "covers" the edge-connector fingers, they are not heavier gold.
What's out there, for adding gold to those fingers? There's a good
number of them, not just a dozen or two. I"m bothering to ask the
question here, because it's a "vintage repair" problem also. A solution
for one or two fingers, is a solution for many. Or, tell me "nickel
isn't so bad, don't insert and remove it every day, you'll be fine".
No, I won't spend $300, $600 for a gold-plating electro-pen system. If
someone has that and wants to give me a quote, I'm all ears, tell me how
many microns you'll plate. No, I won't mix up cyanide solutions, not
likely to use nitric acid; it's outside my experiences and one "oops"
could really ruin my day. I don't expect to rub gold-leaf on fingers and
glue them down, that won't last. I may well go to some PC board shop and
ask them for a quote, maybe someone has done that.
So - what do people here know-of, from repair experiences or their own
experiences? I have looked around the Web, there's means of doing these
things, but it's hard to judge them "cold". And of course, it's hard to
search on "hobbyist covering PCB edge connector with gold", there's many
people selling products or showing how they mess with aqua regia or coat
quarters with microns of gold.
Herb "Goldfinger" Johnson
Herbert R. Johnson, New Jersey in the USA
http://www.retrotechnology.com OR .net
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