Off-subject--sort-of!

[Garey Barrell]

Murray -

I think what you're remembering is in regard to silver plating of tank
circuit components.  Skin effect becomes more pronounced as you go up in
frequency, and beginning at VHF most of the current is very near the
surface.  The higher you go in frequency, the closer to the surface the
current flow.  Copper oxide is a lousy conductor while silver oxide is an
excellent conductor.  Almost as good as silver itself.  Obviously in
waveguide the conductivity of the surface is paramount.

Perhaps what you are remembering is that it's conductivity is
only  _important_  at VHF and above, because of skin effect.

73, Garey - K4OAH
Atlanta


At 10:47 PM 8/2/2002, you wrote:
>Hi:
>
>I've never checked, but I read and was told in school it was conductive only
>at VHF & higher. Maybe that information was distorted based on the problem
>that would exist with waveguides if it were NOT conductive.
>
>Murray
>----- Original Message -----
>From: "Garey Barrell" <k4oah at mindspring.com>
>To: <multi-volti at MULTI-VOLTI.COM>; <HEATH at LISTSERV.TEMPE.GOV>
>Sent: Friday, August 02, 2002 10:57 AM
>Subject: Re: Off-subject--sort-of!
>
>
> > DC too!!
> >
> > 73,
> > Garey - K4OAH
> > Atlanta
> >
> >
> > At 01:59 AM 8/2/2002, multi-volti at MULTI-VOLTI.COM wrote:
> > >Silver oxide is conductive at VHF and higher.
> > >
> > >Murray
> > >
> > >----- Original Message -----
> > >From: "john" <johnmb at NC.RR.COM>
> > >To: <HEATH at LISTSERV.TEMPE.GOV>
> > >Sent: Wednesday, July 31, 2002 9:12 PM
> > >Subject: Re: Off-subject--sort-of!
> > >
> > >
> > > > If it's silver, and it's the black oxide you're concerned about , fear
> > >not!
> > > > Silver oxide is conductive!
> > > > 73
> > > > John wb5oau
> > > >
> > > >
> > > > At 01:16 PM 7/31/02 -0500, Fred Olsen wrote:
> > > > >
> > > > >Allen Heibeck wrote:
> > > > >
> > > > >> The vintage test equipment- Heath, Tektronix scopes,
> > > > >> etc,  used BNC connectors (silver-plated?) ...
> > > > >> What is a safe way to clean-off years of oxidation
> > > > >> without leaving an undesirable coating?
> > > > >
> > > > >Allen, if the BNC is "on-Heath" it's "on-topic".
> > > > >I've had good results cleaning precious metal connectors with Tarn-X.
> > > > >It's strong, and will remove any patina in addition to oxides, but it
> > > > >works.  Appropriate tools include cotton balls, toothbrushes, pipe
> > > > >cleaners (mind the wires though), toothpicks - whatever will get
>where
> > > > >you need to go.
> > > > >
> >
> >

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