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Re: [TowerTalk] Baluns for RX antennas

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Baluns for RX antennas
From: Jim Lux <jimlux@earthlink.net>
Date: Mon, 23 Apr 2012 07:27:33 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
On 4/23/12 7:05 AM, Craig Smith wrote:
>
> The SRF of these chokes is about 2.4 MHz, so they will operate below 
> resonance on 160 and the BCB and above resonance elsewhere.  I measured>  7.5 
> Kohms impedance at resonance, but it is probably higher due to my measurement 
> limitations.  The impedance vs. freq is roughly as follows:
>
> 500 KHz       1.4 K ohms
> 1 MHz 3.5 K
> 5 MHz 4 K
> 10 MHz        2 K
> 20 MHz        1 K
> 30 MHz        0.6 K
>


out of curiosity.. what was your measurement setup?
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