4 Jun
2007
4 Jun
'07
2:49 p.m.
Grant Stockly wrote:
Chuck Guzis wrote:
I would have thought as Chuck did, however I scrapped some circa-1969
Hewlett-Packard reed-scanners 3-4 years ago which were similarly tin-plate PCB
fingers in gold-plated sockets. The tin plate was as shiny and clean as if it
just came out of the dip!
I learned that the rule was "gold against gold" and "tin against tin"
for edge connectors and IC sockets. Otherwise, there would be
galvanic corrosion between the tinned and gold surfaces, particularly
in high-humidity environments.
Is this not true?
I'm not sure. I have a 30 year old Altair with gold plated sockets and tin
plated boards. Works fine and I don't see any oxidation. I pay about $5-7
extra per PCB to get gold plated fingers, just because people buying my kit
are most likely not buying it for what it does but more likely what it
looks like. : )