Yep, all of that current could be common-mode :-)
Date: Fri, 5 Aug 2016 08:49:52 -0700
From: Danny Richardson <k6mhe@k6mhe.com>
To: rfi@contesting.com
Subject: Re: [RFI] Balanced-line antennas and couplers
Message-ID: <42f9a133-9c76-b133-1601-4039cf5def62@k6mhe.com>
Content-Type: text/plain; charset=windows-1252; format=flowed
Identical current indication on a matched pair of thermocouple RF amp
meters do not necessarily mean the transmission is balanced as the
current magnitudes might be equal but the 180? phase difference isn't.
Roy explains this situation one page 4 of his paper /"Baluns: "//What
they do and how they do it//."/ that can be found at:
http://eznec.com/Amateur/Articles/Baluns.pdf
Danny, K6MHE
On 8/5/2016 7:30 AM, Kenneth G. Gordon wrote:
> On 5 Aug 2016 at 5:19, Rob Atkinson wrote:
>
>> Balanced line operators need a pair of identical thermocouple amp
>> meters.
> Yes. Got any recommendations on which to use? There are at least a couple of
> schematics
> and articles on home-built units on the web. What do you use?
>
> I have a link-coupled home-brew balanced coupler I built many years ago which
> I am going to
> use with my "new" Vertical Vee-Beam antenna as soon as the Swainson's Hawk
> family which
> has taken up residence in my only support (a 110' tall Grand Fir Tree) leave
> this fall.
>
> So, I want to install a pair of RF ammeters to help me achieve balance.
>
> Ken W7EKB
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