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Re: [TowerTalk] Test Fixture for Common Mode Chokes

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Test Fixture for Common Mode Chokes
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Sat, 24 Jan 2026 12:02:27 -0800
List-post: <mailto:towertalk@contesting.com>
On 1/24/2026 6:32 AM, Brian Beezley wrote:
Jim, one of the reasons I wrote the program is because I suspected using the resistive part of the choke impedance often was overly conservative.

Sure. And I understand all of the practical realities that you point out. But as I see it, all that is dancing on the head of a pin.

99.9% of hams don't have the capability to measure the multiple systems into which they must insert a choke. When I worked briefly at Motorola as a student, I learned the fundamental principal that every part that comes out of the box has to work. I also learned from Bob Drake (at R. L. Drake) as a student that you've got to wind your own coils.

73, Jim K9YC

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