http://elecraft.85.s1.nabble.com/43-Vertical-and-the-K2-tuner-tp2481408p2483526.html
I am in the process of building a 40 meter 1/4 wave vertical. My hopes for
does not. I understand that a dense radial field is necessary for good
results and that the far field which I have no control is a factor. My plan
few inches below soil. I thought of using ladder line as the radiator,
line. If that does not prove out, I have aluminum tubing which to make a
1/4 wave for 40. Anyone have any comments pro or con for my project? So
I have K3 #1366 and really like this radio. A lot to offer in such a small
>
> Keith, in theory the 5/8 vertical should be 3 db stronger than the 1/4
> vertical installed in the same position. A ground plane on top of a house
> could easily be as good or better than a 5/8 wave ground mounted and
> radiating into the side of the house and some trees. 3 db is about 1/2 S
> unit anyway, so it will not be a large difference. You are correct about
> the far field conductivity being very important in how a vertical antenna
> will play, whether it is mounted on top of a tower or house or ground
> mounted. The radials are most important to bring up the radiation
> efficiency, the far field is most important for the take off angle.
>
> The 43 foot vertical will have a higher radiation resistance than a
> shorter vertical for all bands, making it easier to get the efficiency up.
> It will still be lower than 50 ohms for 160, 80 and 60 meters, about 50
> ohms for 40 and higher for the upper frequencies. I don't have one
> because I have a 3 element SteppIR with the 30/40 dipole trombone at 21
> meters. I don't think the 43 foot vertical will play as well, but they do
> play well. I have worked several of the Zero-Five offering and they all
> play well. I would expect the DXE, Hygain and MFJ to play well also, but
> they are newer and I don't know anyone who has one. All still need a good
> ground plane and will play much better with conductive soil.
>
> Willis 'Cookie' Cooke
> K5EWJ
>
>
> --- On Sun, 3/15/09, Darwin, Keith <
[hidden email]> wrote:
>
>> From: Darwin, Keith <
[hidden email]>
>> Subject: Re: [Elecraft] 43' Vertical and the K2 tuner
>> To: "James Apple" <
[hidden email]>,
[hidden email]
>> Date: Sunday, March 15, 2009, 2:39 PM
>> A few years ago, I was really on the 5/8 vertical bandwagon.
>> I thought it was the cat's meow. The problem was that
>> real world A/B testing did NOT show it to be any better than
>> a 1/4 wave vert.
>>
>> I had a 5/8 wave vert for 15 meters. Ground mounted over
>> 16 radials. An ATU at the base took care of the small
>> impedance mismatch and RG-213 carried the signal to the rig.
>> Hot stuff - or so I thought.
>>
>> I also had a 1/4 wave ground plane (4 radials) on the roof
>> of my single story house. It was fed with RG-58. I spent a
>> lot of time with an A/B switch listening to both antennas.
>> You'd think the 5/8 with it's mondo low-angle
>> radiation pattern would walk all over the 1/4 wave but it
>> DID NOT. DX signals as the band was just opening or closing
>> were sometimes stronger on the 5/8, other times on the 1/4.
>> There was no clear winner.
>>
>> It was years before I found the answer.
>>
>> Apparently, that wonderful low angle radiation that we want
>> out of the 5/8 wave antenna depends HEAVILY on the ground
>> conductivity many, many wavelengths away from the antenna.
>> Far out of the reach of any ground radial system, poor soil
>> conductivity is sucking the low angle radiation down to near
>> zero. Sure, over salt water it is fabulous, but for the
>> vast majority, it just doesn't pan out that way.
>>
>> So, for "normal" soil, it seems the best height
>> is something less than 1/2 wave.
>>
>> I run a 33' vertical with a Hustler 80M resonator on
>> top. It resonates on 80 and 40 and does pretty well on
>> those two bands. It also delivers the goods on 30 meters
>> due to the remote tuner. On 20 meters and higher it
>> isn't really all that impressive.
>>
>> - Keith N1AS -
>> - K3 711 -
>>
>>
>> -----Original Message-----
>> From:
[hidden email] on behalf of James
>> Apple
>> Sent: Sun 3/15/2009 9:26 AM
>> To:
[hidden email]
>> Subject: [Elecraft] 43' Vertical and the K2 tuner
>>
>> After the ice storm of 2009, I'm looking for an new
>> antenna. I've
>> been considering the 43' verticals by DXE,HyGain and
>> MFJ. But I'm not
>> sure if my K2 tuner will have the range needed. The DXE
>> site has a
>> warning about internal tuners. Anyone using a K2 and a
>> 43' vertical ?
>> how's it play ?
>>
>> Thanks in Advance
>>
>> - Jim (WB1DOG)
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