Hi Bob,
Are you using the Johnson Matchbox to go from unbalanced (coax) line to
balanced, and then your balanced L net between the feedline and the
Johnson? I suspect not, but then what are you using to go from
unbalanced to balanced? A toroidal transformer, or some sort of coiled
up coax balun?
N6KB
I'll take an air-wound inductor over a toroidal inductor any day,
space available. The typical loss in an air-wound inductor is IR loss
where a toroidal has IR loss plus eddy current loss.
I know one thing, my Johnson Matchbox sure does a slick job of
handling the open wire, balanced antennas. My most recent tuner is
home brew, being a balanced L network much like the Palstar evaluated
in March 2013 QST. It will easily put the 40M dipole on 160M and
handle legal limit power to boot.
73
Bob, K4TAX
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