Fred W4JLE wrote:
Can you give us a typical loss for a tuner matching a G5RV?

No, sorry, I can't, and I don't believe there is such a thing. It's
possible of course to find the input impedance of any wire antenna like
the G5RV at each of the frequencies of interest. But transmission line
lengths and impedances vary, which transforms the impedance seen by the
tuner. Those impedance changes can be dramatic, and can result in widely
varying tuner efficiency. On top of that, you have the variations in
tuner topology and construction which makes a "typical" tuner also an
elusive beast. I'd be very suspicious of any "typical" tuner loss
figure, and wouldn't expect to see it in practice unless the conditions
are spelled out really well and my setup was very similar.

You see, I'm not a true Guru. A real one wouldn't waffle like this, but
would give you a positive answer, and you'd very probably never have
reason to doubt it.

Roy Lewallen, W7EL