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Re: [TowerTalk] Common Mode RF choke on a 50 MHz yagi

To: Jim Thomson <jim.thom@telus.net>, towertalk@contesting.com
Subject: Re: [TowerTalk] Common Mode RF choke on a 50 MHz yagi
From: "Richard (Rick) Karlquist" <richard@karlquist.com>
Date: Wed, 1 Jul 2020 14:45:45 -0700
List-post: <mailto:towertalk@contesting.com>


On 7/1/2020 10:27 AM, Jim Thomson wrote:
Date: Sun, 28 Jun 2020 15:10:18 -0700

shorter.  Using Ricks  56 inches,  thats a 5%  shortening.  No  loop  required,
except for normal rotor loop.


Jim  VE7RF


I meant 59 inches for 50.000 MHz.  Quarter wave free space.
Looks like I miscalculated or something and ended up typing
56 inches.   I wasn't trying for 5% short.  My bad.

Anyway, I think your method makes even more sense.

As a former network analyzer designer, I am impressed
that you were able to think outside the box and use
a current probe as a superior modality.  That emulates
the architecture of the HP 4815 vector impedance
meter, which is nothing like a VNA.  Good job!

73
Rick N6RK
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