Martin, you do say close to the antenna so that is good. You don't say what
kind of antenna, so that make a difference.
I'm not one of those guys who is adverse to using sleeve cores, if there are
enough of them. Looking at the Laird data, they show impedance v. frequency
without saying whether is predominately resistive or reactive. Because it's
pretty flat, I'm guessing resistive. In that case at HF, ten cores would give
600-800 ohm.
Many who subscribe to the idea that you need 5K or higher will disagree but I
think for the average beam or resonant dipole, that is enough. The only
problem I see is that the diameter is so small. I can't think of a cable I
would want to use that would fit through those cores.
Wes N7WS
On Tuesday, January 3, 2023 at 12:04:24 PM MST, Martin Kratoska
<martin@ok1rr.com> wrote:
The attached picture displays my proposed CM choking scheme around the
antenna switch. Take a look at this and comment, please - what is
insufficient, what is an overkill etc.
The pic is also here:
https://ok1rr.com/public/choking.png
73,
Martin, OK1RR
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