Quote:
Originally Posted by Ether
Are there not suitable sliprings for this application which contain no mercury?
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A few years back I found it very difficult/impossible to find a non-Mercotac COTS slip ring that was simultaneously (a) rated for FRC current levels and (b) within single-components COTS cost limits. It is possible that you could make your own spring-loaded slip ring, but YMMV with inspectors/rules in a given season.