Sorry, not sure what's up with the links on Greg's site but I see that cutting
and pasting that link does not work while selecting it from his home page
directly does..
Article appears on his home page about halfway down under the title "Building
High Power, High Q, Loading Coils - Epilogue"
Home Page:
http://www.seed-solutions.com/gregordy/Amateur%20Radio/W8WWV%20Experimentation.htm
He makes a series of measurements on aged copper coils and compares them with
un-oxidized. Addresses skin effects and the other characteristics.
W7TMT
-----Original Message-----
From: W7TMT - Patrick
Sent: Saturday, September 30, 2023 13:10
To: TowerTalk@contesting.com
Subject: RE: [TowerTalk] copper tank coils
Greg, W8WWV may have the answers to some of your questions here:
http://www.seed-solutions.com/gregordy/Amateur%20Radio/Experimentation/HiQCoil2.htm
73
Patrick, W7TMT
-----Original Message-----
From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of Ken WA8JXM
Sent: Saturday, September 30, 2023 11:00
To: Mark, K5AM <k5am@zianet.com>
Cc: TowerTalk@contesting.com
Subject: Re: [TowerTalk] copper tank coils
I expect results would be frequency dependent since the skin effect is
frequency related AFAIK.
I have some war surplus rotary inductors made with solid silver wire.
You can add that to your list also :-)
Ken WA8JXM
On Sat, Sep 30, 2023 at 1:45 PM Mark, K5AM <k5am@zianet.com> wrote:
> > Jim wrote:
> > I have wound identical coils using silver plated copper,
> > copper, and also 304 SS. The aluminum coils ran hot.
> > The SS coils ran stupid hot.
>
> Interesting!
> It would also be great to see data comparing:
> silver plated copper
> copper
> oxidized copper
>
> 73,
>
> Mark, K5AM
>
> _______________________________________________
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