I was thinking that maybe the efficiency of an antenna resonant at 3.5 MHz
would be poor at 3.8 MHz where I want to use it. If there is no diminution
of efficiency when the tuner fixes the impedance, then I'll just keep using
it as is.

--
Bruce Wilson KF7K
http://science.uvsc.edu/wilson
"Fred Hambrecht" wrote in message
...
The G5RV requires a tuner, this obviates trimming the antenna for any
portion of a band.

If you look at the total antenna system (feed line length and antenna
length) you will find that shorting the antenna and leaving the feedline
length alone will result in not being able to tune the high end of the
band on 75 meters using most commercially available tuners.

If you plot all frequencies betwee 3.5 and 30 Mc you will note a large
hole just above 4 Mc where no practical tuner can create a match.

"Bruce Wilson" wrote in message
...
I was looking through the G5RV instructions including the original
article, and it's clear the antenna, when it is 102 feet long, is tuned
for the bottom of the bands. Anyone have any experience trimming one down
to resonate in the mid part of the voice bands?

--
Bruce Wilson KF7K
http://science.uvsc.edu/wilson