Most small RF connectors are beryllium copper, tellurium copper, or brass with a gold plating for corrosion resistance. Same for audio connectors. While gold is not the ideal conductor, it's better in the long run than other materials that decay and corrode.
What's the best plating material for interconnects plugs ?
Does anyone has opinion on whats the best plating material for connector plugs, is it silver, gold or rhodium ?