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Old June 27th 05, 08:31 AM
Roy Lewallen
 
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Hal Rosser wrote:

Apparently it makes more difference to me than it does to you.
I don't want it digging into the tree branches.
Nothing wrong with your view - its probably a better-informed view than
mine - but I'll still use balanced line and I still think baluns are too
heavy. I'm just hard-headed that way. :-)


Unfortunately, using "balanced" (symmetrical) line doesn't prevent or
reduce feedline radiation. It's subject to the same effects as coax. The
only difference is where it happens. Conducted common mode current is
explained in http://eznec.com/Amateur/Articles/Baluns.pdf. As for
current induced by mutual coupling, both types of feedline will have the
same amount of induced common mode current, due to the same cause and
having the same effect.

It's not the geometry of the feedline that causes or prevents feedline
radiation.

Roy Lewallen, W7EL