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Re: [TowerTalk] Solenoid or Binocular configuration?

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Solenoid or Binocular configuration?
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Sun, 21 Oct 2012 15:09:01 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
On 10/20/2012 7:23 PM, K8RI wrote:
My question is about the difference between the 6 cores stacked or two stacks side by side.

For a ferrite choke with close-spaced turns, it does not matter if he cores are together or separated. What matters is the number of turns and the number of cores. The inductance increases with the square of the number of turns, and in proportion to the number of cores. The capacitance increases with the number of turns and with close spacing. What you want is the lowest practical resonant frequency, and you can use the measured data in my RFI tutorial as a guide. So for the lowest possible resonant frequency you want more turns and more cores, tightly spaced.

73, Jim K9YC


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