I experimented with a G5RV. I did not have worth while results. A simple
dipole with a quality current balun easily outperformed it. I also tried
the "Mystery Antenna" - a joke. Measurements were down to a millimeter.
It was up for an hour then was scrapped. I did have "acceptable" results
with the G5RV in that my Differential-T tuner could load it on 40
through 10 quite easily.
My next test was a 132' doublet fed with 40' of good quality 300 ohm
twin lead into an excellent 1:1 current balun with 10' of RG/213 into my
tuner. Tunes 160 through 10 with my Diff-T tuner. Signal reports were
outstanding on 40 and easily a match for the dipole on 20. Nothing
surprising about these results.
As many have said before - the 132' wire-fed doublet is the best
overall, must versatile antenna you can erect.
73, Doug -- KJ0F
On 12/9/2018 12:52 PM, Bob McGraw K4TAX wrote:
From my experience, more folks should pay attention to the antenna and
balun work done by DJ0IP. They would likely have better performing
antennas. His work is proven on antennas and not text book or
computer models, but indeed he provides real world results.
73
Bob, K4TAX
On 12/9/2018 10:30 AM, CUTTER DAVID via Elecraft wrote:
In addition, Reg was designing in the era of valve output
transmitters with built-in pi-tank matching system, so, it was
possible to match on different bands. I'm sure mine worked across 80
to 10m in those days. For 80 to 10m these days I use a
off-centre-fed dipole with hybrid choke/transformer at the feed point
as designed by DJ0IP for minimum common mode current.
David G3UNA
On 08 December 2018 at 16:32 Ken G Kopp <[email protected]> wrote:
As I've already stated … I have a copy of the original Varney
RSGB article that describes the G5RV and plainly states that
it's a 20M only antenna.
Remember, it requires an antenna tuner …
Start with a dipole …
Keep the "magic" 32' length of 300 ohm feedline.
Delete the 68' of coax.
What's left? A "normal" open wire fed dipole, better
known as a Zepp.
73!
Ken Kopp - K0PP
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