In article ,
Brian Gaff wrote:
Would you believe it, this beefy switch,
presumably originally made for mains use had gone intermittent on one
contact.?

Not that uncommon. Mains switches may just have brass contacts which
corrode. The relatively high current with mains tends to keep them clean
(the spark as they operate)

Signal switches usually have plated contacts to prevent corrosion.

--
*Don't worry; it only seems kinky the first time.*

Dave Plowman London SW
To e-mail, change noise into sound.