[RFI] Old wives tail, or true?

[David Gottschalk]

Interesting, I wondered about the validity of this "test"

So really the only way to know for sure if you have common mode noise on
the coax, is to put a filter in place?

73,
David
KN4ZKT

On Thu, Apr 8, 2021 at 1:36 AM Jim Brown <jim at audiosystemsgroup.com> wrote:

> On 4/7/2021 7:38 PM, Dave Cole wrote:
> > Is this true, and if so, why?
>
> No. With the shield disconnected, the antenna is different -- if there's
> an effective choke at the top, it's now a long wire ending at the choke,
> because the shield and the center are capacity-coupled together. And if
> there's no choke at the top, it's a top-loaded long wire.
>
> 73, Jim K9YC
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