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Re: [RFI] Balanced-line antennas and couplers

To: rfi@contesting.com
Subject: Re: [RFI] Balanced-line antennas and couplers
From: Rob Atkinson <ranchorobbo@gmail.com>
Date: Sun, 7 Aug 2016 17:47:21 -0500
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
>IF -- this is not always *necessary* -- we want to see if currents in a 2-wire 
>feedline are unbalanced, I think a symmetrically placed ferrite core of 
>appropriate diameter around >BOTH conductors, with a "secondary" winding 
>feeding a sensitive meter or 'scope (etc) is the way to go.

>Also, we need to be aware that surplus thermocouple ammeter calibration may 
>not be as good as our other and modern instruments; OT's know this -- and when 
>to put up with >it.


Excellent points.  identical toroidal coils as pickups, one on each
side and at the same location is an excellent way to go.  they can
feed a dual trace scope and you can see both phase and amplitude.
Mike WZ5Q has integrated this approach in a home brew link tuner of
his.

73

Rob
K5UJ
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