[TenTec] Balun Isolator

[Gary Hoffman]

The coax shield is like a water pipe.  It has an inside diameter, and
surface, and an outside diameter, and another surface.

The inside surface carries (or is supposed to carry except for imbalance) a
current equal and opposite to that of the center conductor.

What is carried on the outside surface of the shield varies greatly, and is
what has been discussed here.


----- Original Message ----- 
From: "Jim WA9YSD" <wa9ysd at yahoo.com>
To: <tentec at contesting.com>
Sent: Thursday, May 08, 2008 7:34 PM
Subject: Re: [TenTec] Balun Isolator


> Current flowing on the in-side of the coax?  I all ways thought RF flowed
on the surface.  If this whole thing is out of balance this is what causes
every one problems.
>
> Back to the beginning again.  A continuous loop.
>
> Some type of an isolator or coax choke is needed at the rig along with a
good RF ground.  RF ground we should start another topic on this.
>
> The RF that comes back on the out side of the coax, current loops, grounds
is what I have been struggling with for years.  Operating an amplifier just
amplifies the problem.  There is no way to get away from this.  You can
reduce it, direct its path but is still there and still finds it way to
haunt you.  This is not a perfect world or situation to deal with.
>
> All these people who operate QRP I have great respect for them cause of
their patients, persistence, creativity to make what they have the best it
can be and to get the most out of it.
>
>  Keep The Faith, Jim K9TF/WA9YSD
>
>
>
>
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