On Tue, 14 Sep 2010 19:11:43 -0400, "Ralph Mowery"
wrote:

That is what I am using on a home built version. Using a 4:1 voltage balun
at the feedpoint

This is like using a lighter to find a gas leak in the basement.

and the ferrite bead type about 20 feet down from the
feedpoint.

The ferrite choke is doing something as it gets warm while running around
about 1 KW to the antenna. Doesn't heat up when going into a dummy load.

Hi Ralph,

Through the 4:1? Probably not, or you would have said so (and
unlikely you have gone to the trouble to build a 4:1 dummy load).

As the dummy load is most likely enclosed and shielded, then that
suppresses common mode currents due to your test transmission.

And, yes, when your ferrite choke (AKA 1:1 BalUn) heats up that is due
to common mode currents that were not snubbed by the voltage balun (by
design - so why choose it?).

Add a second ferrite choke (AKA 1:1 BalUn) at the feedpoint -before
feeding the voltage balun.

My 'Windom' usually works beter than an 80 meter dipole on 80 meters plus
gives me the option to operate several other bands.

Better in what sense?

73's
Richard Clark, KB7QHC