I had considered a G5RV but opted instead for a 119' long wire up about 65'
over a tall tree. Loads under 1.5:1 on all bands from 10-160 with a tuner; many
bands load at 1.1:1.
Ron Fish, KX1W
Sent from my iPhone
> On Sep 14, 2014, at 23:58, "Bob McGraw - K4TAX" <RMcGraw@Blomand.net> wrote:
>
> The developer of the G5RV basically states that it is optimized for 20M, thus
> typically having a low SWR of 1.8:1 on that band. Other bands the G5RV will
> have a higher SWR in the range of 5:1. Thus on some frequencies the G5RV
> may be too reactive for the limited range of many internal tuners.
>
> Interesting enough, the length of the G5RV is 51 ft on each side of center
> for a total of 102 ft. overall. Then add the 31 ft of 450 ohm ladder line.
> Looking at the configuration we see it is basically two inverted L's oriented
> back to back with the long portion of the L being the flat top 51 ft sections
> and the short part of the L being each side of the 30 ft of ladder line. To
> sum it up, a dipole with reverse drooping ends for a total length of 133 ft.
> Just the right length of most 80M antennas. However with the feedline length
> of 31 ft, considering velocity factor, it is approximately 1/2 wave on 20M.
> Thus the flat top ends each become 3/4 wavelength on 20M for 1.5 wavelengths
> overall. The impedance at the center feedpoint is ~90 ohms, depending on
> height above ground. With a 1/2 wavelength transmission line being fed from a
> 1:1 current balun this load is seen by the transmitter with the SWR on the
> coaxial segment being approximately 1.8:1.
>
> While some claim that the G5RV is an all band antenna, we find in reality it
> is a non resonant dipole fed with a section of ladder line from a 1:1 current
> balun. Thus a wide range tuner is required to match this antenna on all HF
> bands where the antenna is approaching 1/2 wavelength or more.
>
> You are correct, the configuration you have is certainly not a G5RV by any
> degree of imagination.
>
> 73
> Bob, K4TAX
>
>
>
>
> ----- Original Message ----- From: "Wade Staggs" <tvman1954@gmail.com>
> To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
> Sent: Sunday, September 14, 2014 9:09 PM
> Subject: Re: [TenTec] Antenna names
>
>
>> *Running 126 feet of wire... 63 feet in each direction... Center fed with
>> 450 ohm Window Line. It is most assuredly Not a G5RV. But my friends keep
>> wanting to call it a G5RV. We can work 80 thru 6 meters with a good manual
>> tuner. Is it the best antenna in the World? Of course not...... But at this
>> Rental Property with some restrictions, we can talk and hear about the same
>> as others using Fan Dipoles and Dedicated to the Single Band Dipoles.
>> Everything in life is a compromise. Can I unbalance the antenna and offset
>> the Window Line an inch from the dead center and call it a Windom? This
>> would clear up everyone's insistence that my antenna is a G5RV..... Just
>> Joking Folks....*
>>
>> *
>> 73 from Wade/KJ4WS*
>>
>> On Sun, Sep 14, 2014 at 2:41 PM, Ken Brown <ken.d.brown@hawaiiantel.net>
>> wrote:
>>
>>> The Zepp was a one sided antenna, with a quarter wavelength openwire
>>> feedline to a halfwave wire. ....
>>>
>>> Hams are funny about naming antennas. For example, a Zepp antenna may have
>>> been clearly defined as above, but then people make modifications that
>>> diverge so much from the original meaning of the name it makes no sense to
>>> keep using that name. Make it into a dipole, and call it a "Double Zepp."
>>> There is no way a Double Zepp could ever be used the way a "real Zepp" was
>>> used on a Zeppelin....
>>>
>>> Or make the horizontal wire longer, and call it an "Extended Zepp." But
>>> then it is not the length it needs to be a normal Zepp. So why keep calling
>>> it a Zepp?
>>>
>>> Then there is the G5RV antenna. The "inventor" G5RV said there is no such
>>> thing. He built a dipole and experimented with various lengths of ladder
>>> line and coax, to try to find a combination that worked good on multiple
>>> bands. He said it was just a dipole, but the ham community called it a
>>> G5RV. Now there are hams who claim that a specific length dipole, with
>>> specific lengths of ladder line and coax feeding it are "genuine G5RV
>>> antennas" and the anything else is not. Other hams think that any dipole
>>> fed with ladder line is a G5RV.
>>>
>>> DE N6KB
>>> _______________________________________________
>>> TenTec mailing list
>>> TenTec@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/tentec
>> _______________________________________________
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>
>
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