[TenTec] G5RV

[Rsoifer at aol.com]

I don't consider myself an expert, but in my considerable experience with  
G5RVs and similar antennas, any G5RV can be improved by putting an antenna tuner 
 between the coax and the balanced feedline.  If that is done, the balanced  
feeder can be virtually any length at any frequency above 3.5 MHz.
 
73 Ray W2RS
 
 
In a message dated 1/31/2009 8:47:18 P.M. GMT Standard Time,  
mathenyr at marietta.edu writes:

The G5RV  has been well reviewed by several experts.  The best review I 
know of  is by VE2CV and VE3KLO, in the ARRL Antenna Compendium Vol. 4.

The long  and the short of it is this:  A G5RV is a 100 foot long piece of  
wire. The best way to feed that on multiple amateur bands would be with  a
multi-band matching network a selected point on the wire.  Then the  
feedline (whatever type) would be in a matched condition and losses  would
be least.  An automatic antenna tuner would be ideal for such  purpose, 
mounted at wherever the feedpoint is to be located.  If you  can't put the
tuner up there, well-made openwire line will come close in  performance,
with a proper tuner in the shack. You may have to trim the  open-wire
length to get an easy tune on all bands.  But the antenna is  a 100 foot 
piece of wire--with all the traits of any 100 foot piece of  wire!

Adding baluns, stubs, coax, etc. as is often shown will only add  loss
to the system.  That loss is what improves the match on some  bands!

Pattern wise, that feedpoint mentioned above should be at the  center if
you want best results at 20 meters and below.  If the higher  bands are 
your favorite, then there may well be a better spot...perhaps at  an end.
But that will create other problems, and probably  losses.

The marvelious thing, however, is this:  Despite all that  one can 
find wrong with this "100 feet of wire" there are a gizilion and a  half of 
these things out there making QSO's at this very second.  It  doesn't take
a great antenna to make a lot of contacts.

Ralph  Matheny
K8RYU
207 Gibbons Place
Marietta Ohio   45750
mathenyr at marietta.edu








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