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Re: [TowerTalk] Feedline (choke) question

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Feedline (choke) question
From: David Gilbert <ab7echo@gmail.com>
Date: Tue, 30 Sep 2025 12:21:02 -0700
List-post: <mailto:towertalk@contesting.com>


Brian, I didn't say there shouldn't be any current.  I said there isn't any current that just goes to ground and stays there ... as in bleeding it off.  EZNEC doesn't show that either.  It just shows current going back and forth between the earth and the coax ... and when it goes back to the coax where do you think it goes?  It doesn't just pile up at that spot on the coax .. it goes wherever it was going to go anywhere, either back to the antenna or to the transmitter.

Why do you think otherwise?

Dave   AB7E



On 9/30/2025 10:17 AM, Brian Beezley wrote:
"I already answered that."

Dave, the antenna model I posted contradicts this assertion you made:

"I already did with the example of a floating portable setup. Current requires an E-field to push it.  You could connect a grounded wire to a point on the coax shield and it wouldn't shunt any common mode current to ground because there is no E-field (voltage) for it."

I'm just curious what you made of the antenna model. It shows a current where you say there shouldn't be any.

Brian

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