SB-200 arrives

[T. David Cohen]

First, silver oxide (tarnish) IS conductive so there's no reason to remove it.

Second, the pressure exerted by the contact (wiper) against the rotor will remove the
oxide anyway - if you look closely, there will be a very thin, bright line that will
appear after the switch is exercised a few times.

Any attempt to "clean" the contacts can't help and could possibly damage the switch.  It's
a bad risk since there's nothing to gain and lots to loose.

The discussion is academic but its fun.

73s,  Dave Cohen

Ed Mosher wrote:

> Ron and all:
>
> NO! NO! NO!  DO NOT rub the contacts with an eraser end of a pencil.
> It's an abrasive and will remove some of the plating.  That leads to
> contact failures and the switch may eventually suffer a "meltdown" due to
> thin plating.
>
> Ed Mosher
> WA8ZVO at JUNO.COM         Formerly  "One of the Hams at Heath"
>
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