A good discussion of the orginal G5RV design, and its modern improvement
by EZNEC modeling, by ZS6BKW, Brian Austin, is contained in the
following link from G-QRP club's SPRAT magazine:
http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=19470
Brian makes clear the antenna while optimized originally for 20m, can
serve multi bands given that rigs can tolerate a 2:1 SWR or that you use
a tuner. The original G5RV antenna was 102 feet long, and the
subsequent ZS6BKW started with that and analyzed which lengths would
work on most of the original bands and on the WARC bands within the SWR
limit accepted for analysis.
My ZS6BKW variant, for the first time uses a flat top dipole, and brings
the ladder line matching section off horizontally at exactly a right
angle. It was a hot antenna for 20m, 40m, and worked on the other bands
as advertised, but was lack luster on 15m, where it had 3:1 SWR. Mine
was only 20 feet high at one end, and 15 feet at the South end of the
flat top. The horizontal matching section undoubtedly favorably
distorted the pattern, such that I was able to round table with VK/ZL
land simultaneously while working South America and North America with
strong signals both ways. Of course, the impedance relationships would
change with varying height. And it should work better higher than I was
able to manage. But, for a home made antenna, it was very satisfying.
Because I added the horizontal orientation of the matching section, I
named this antenna a ZS6BKW/ K5KVH.
Duane Calvin wrote:
> Hi Ron - yes, I know - I have a 40m (half sized) version mounted way too
> low over my house which I use for many bands with fair success. I was
> trying to understand the position being taken that there was only a single
> band design of the G5RV style antenna.
>
> 73, Duane
>
> Duane Calvin, AC5AA
> Austin, Texas
> www.ac5aa.com
>
> -----Original Message-----
> From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
> On Behalf Of Ron Zond
> Sent: Tuesday, February 03, 2009 9:52 AM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] G5RV
>
> Hi Duane
>
> I believe Van Gordon sells a 40 meter version of their G5RV.
> The flattop is 52 feet, and the stub is 16 feet. Works 40 through 10.
>
> Ron
> K3MIY
>
> -----Original Message-----
> From: tentec-bounces@contesting.com
> [mailto:tentec-bounces@contesting.com]On Behalf Of Duane Calvin
> Sent: Monday, February 02, 2009 9:58 PM
> To: 'Discussion of Ten-Tec Equipment'
> Subject: Re: [TenTec] G5RV
>
>
> So, you're saying his design does not scale to other bands, and no other
> manufacturer has built a scaled model and sold it as a G5RV-type design
> then? Wonder what band Yagi-san built his original, well, uh, "yagi" for .
> . . I'm just sayin' . . .
>
> 73, Duane
>
> Duane Calvin, AC5AA
> Austin, Texas
> www.ac5aa.com
>
> -----Original Message-----
> From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
> On Behalf Of Bill Rowlett
> Sent: Monday, February 02, 2009 8:48 PM
> To: tentec@contesting.com
> Subject: Re: [TenTec] G5RV
>
>
> Yes, he did state that it works on the other bands. His reason for the
> design was for a 20 meter antenna which would fit in his garden (back yard)
> and give him gain in the directions he needed. The other bands were a plus.
> He had no 40 meter version or 80 meter version. There is one and only one
> G5RV antenna, Varney's original design. Anything else is not a G5RV so quite
> calling it that.
>
> Bill KC4ATU
>
>> Date: Mon, 2 Feb 2009 20:10:26 -0500> From: mathenyr@marietta.edu> To:
>>
> tentec@contesting.com> Subject: Re: [TenTec] G5RV> > At the risk of
> prolonging the misery of this thread, I must quote > Mr. Varney, G5RV in his
> "update" article in ARRL Antenna Compendium #1.> Quote, "The G5RV antenna,
> with it's special feeder arrangement, is a > multiband center-fed antenna
> capable of efficient operation on all the> HF bands from 3.5 to 28Mhz." From
> that quote, it would appear that Varney> had in mind more than 20 meters.
> The rest of his article is actually > quite interesting. He discusses each
> mode of operation, band band by > band. Must reading for those who wish to
> discuss the antenna, I would> think..........> > Ralph Matheny> K8RYU> 207
> Gibbons Place> Marietta Ohio 45750> mathenyr@marietta.edu> > > > > > > > >
> On Mon, 2 Feb 2009, Bill Rowlett wrote:> > >> > Were in the world did you
> come up with an 80 and 40 meter versions of a G5RV. The G5RV is a 20 meter
> antenna, PERIOD. G5RV designed it for 20 meters. Anything other than his
> design is not a G5RV, it is a center feed dipole.> >> > 73, Bill KC4ATU> >>
> Date: Mon, 2 Feb 2009 03:30:02 -0800> From: wa9ysd@yahoo.com> To:
> tentec@contesting.com> Subject: Re: [TenTec] G5RV> > > > Don't get me wrong,
> adding the 15M wire to the 80M G5RV will work just fine.> > A 40M version
> for a G5RV is the same antenna except the antenna and feed line is just cut
> to half size. It will not work on 80M.> > Keep The Faith, Jim K9TF/WA9YSD> >
>
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