Topband: T Vertical feed

[DAVID CUTHBERT]

No I mean no balun is needed. The coaxial cable external shield current
will be roughly that of one radial. With so many radials the shield current
will be low.

Dave WX7G
On Jan 26, 2012 9:49 PM, "Jim Brown" <jim at audiosystemsgroup.com> wrote:

> On 1/26/2012 4:08 PM, DAVID CUTHBERT wrote:
> > No balun is needed.
>
> What you mean, I think, is that no IMPEDANCE TRANSFORMATION is needed.
> Yet another example of why I object to the word "balun."  And I agree
> that no impedance transformation is needed at the antenna as long as
> some sort of matching is used in the shack.
>
> But a common mode choke IS a good thing, because it keeps RF off the coax.
>
> 73, Jim K9YC
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