Take a look at Kevin Schmidt's (W9CF) paper (
http://fermi.la.asu.edu/w9cf/articles/balun.pdf ) and you might decide that
4:1 transformations are less useful than a common mode choke with
sufficiently high impedence. Check out Jim Brown's (K9YC) paper for
implementation details http://www.audiosystemsgroup.com/RFI-Ham.pdf .
Jim ab3cv
On Sat, Aug 20, 2011 at 10:01 PM, K8RI on TT <k8ri-on-towertalk@tm.net>wrote:
> Most of the tuners I see today use a 4:1 Balun to go from unbalanced to
> balanced.
> For a remote tuner wouldn't it make more sense and be more efficient to
> use a tapped coil, probably in a "T" arrangement and no balun to the
> open wire?
>
> IOW run the coax up the tower to the remote tuner. Tap the coax across a
> coil (rotary inductor) and use variable L and C to get a match to the
> balanced line?
>
> 73
>
> Roger (K8RI)
>
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