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Re: [TowerTalk] Common Mode Choke Question

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Common Mode Choke Question
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Wed, 27 Sep 2017 15:30:49 -0700
List-post: <mailto:towertalk@contesting.com>
Hi Carol,

Amidon does not make cores, they sell stuff made by other companies, and terribly high markups. 2.4-in cores are made from dozens of different magnetic materials, all very different from each other.  Study k9yc.com/RFI-Ham.pdf  and http://k9yc.com/KillingReceiveNoise.pdf

73, Jim K9YC

On 9/27/2017 11:43 AM, Carol Richards wrote:
Hello,

At present I have an inverted "L", 100+ feet vertical with 4 elevated radials, about 130 feet long at 10 feet in height. I am about to construct a CM choke. On hand, I have 4,  Amidon 2.4 inch cores. From the reading, it seems that I should have 5 cores and about 5 turns of RG8 coax. I can I get away with 4 cores?
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