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Information Junky
Join Date: Mar 2001
Location: an island, upper left coast, USA
Posts: 73,167
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Oh, and if the switch contacts are silver(plate) or copper the oxide layer will form even in a drawer. -tarnish, not so conductive.
Edit ...which in a wireless device is challenging for the minimal current used to save battery.
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Everyone you meet knows something you don't. - - - and a whole bunch of crap that is wrong.
Disclaimer: the above was 2¢ worth.
More information is available as my professional opinion, which is provided for an exorbitant fee. 
Last edited by island911; 09-16-2018 at 08:57 PM..
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