http://www.eetimes.com/author.asp?section_id=3D30&doc_id=3D1319831&

Worth reading for anyone using relays in small signal circuits. My solution
would have been to analyze the circuit and add small caps (100n) across the
low current contacts, assuming the rest of the circuit would have worked
with the additional delay. These will charge to supply voltage and provide =
a
nice tiny cleaning arc upon contact closure, keeping the low signal side
reasonably clean. No idea if it would keep like this, it is a hack, but ...

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