Richard,
More specifics are needed for a good answer.
The easy way to do it is to measure the impedance at the shack end of
the feedline with an antenna analyzer.
Yes, you moved the feedpoint away from center (but did not say by how
much) and the voltages will be higher and the current will be
In many instances using a balun, not for balanced to unbalanced
applications, but for impedance transformation application is
suggested. Use a 4:1 as a 1:4 in order to get the low Z to a higher
value. In most tuners, the low impedance range has more loss than the
high impedance range. I
I'm experimenting with portable antennas at the moment for my KX3 and,
rather than cut the 80m legs of my link dipole to get an antenna that
resonates on 60m, I've experimented with running it off centre. I've found
what looks like resonance at the right frequency range, based on low return
loss.
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