[ARC5] roller inductors
Jim Wiley
jwiley at gci.net
Mon Jan 25 20:10:59 EST 2016
I miss Bobbi's contributions, and her sense of humor. Could one of the
moderators give her a special invitation to rejoin the group(s)? I
doubt that I am the only person here that feels this way.
- Jim, KL7CC
>
> On Mon, Jan 25, 2016 at 3:08 PM, Michael Hanz
> <aaf-radio-1 at aafradio.org <mailto:aaf-radio-1 at aafradio.org>> wrote:
>
> An intelligent young lady by the name of Bobbi Barmore on the old
> Boatanchors reflector did some extensive tests on silver polish
> for roller inductors because she was chief engineer of a broadcast
> station. Under microscopic analysis, the "quick" solutions like
> the wipes and Tarn-X etched thousands of microscopic holes into
> the silver layer, and guess what? It then/enhanced/ the action of
> atmospheric sulfides on the surface of the wires because of
> significantly increased area exposed to the air. Switching to a
> cream based polish solved the problem. You might get quick
> results with the quick methods, but you have set the stage for
> eventual failure. I've never had that problem with Hagerty's or
> the other high quality silver polishes, and I have checked with a
> microscope more than once since then.
>
> Jus' sayin...
> Mike KC4TOS
>
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