Bill,
I've been real happy with a JK801 rotatable dipole at 138'. I use a
Green Heron RT-21dc (the other option is an MFJ-1924 mobile antenna
controller) to control the Tornado Tuner. It gives me full band
coverage in 40khz increments.
According to Ken's modeling (unconfirmed by me as I have no clue how to
model) a JK801 at a 1/2 wave length in height is at least equal to a
good 4 square.
https://jkantennas.com/jk801.html
Rich - N5ZC
On 7/7/2020 9:50 AM, Bill via TowerTalk wrote:
I've pretty well figured out what I will be doing on 40-6 meters. However, 80 is still
undecided. Shunt feeding the tower is not going to work since I have all kinds of
rotating antennas up the side of the tower. So, I'm left with three solutions.
Since the last guy point is at 96 ft I could have two inverted Vees apexed at 96
feet down to around 60 ft on the ends, at right angles to each other. That
would give me the ability to switch directions and gain/lose around 5-10 db.
Second choice is to have a full size wire vertical with 60 full sized radials
over average ground.
Third choice is more complex- a wire 4 square but...although the SE and SW facing
verticals would be pretty close to having a good radial system The NE facing one is pretty
limited due to lot lines and the location of the house/garage and the NW facing antenna is
even more limited by the same constraints. This one has a driveway in the way.
Most of the decent sized radials would be pointing away from the direction the NE and NW are
facing and the others would be fairly short.
Of course laying down the radials for the 4 square is quite a chore and I would hate to go
through all that work to come up with crappy system. Easiest of course, would be the
inverted Vees. I've used this system in the past and it performed quite well. I'm
concerned the lack of similar radial systems would ruin the F/B and gain and the compromised
radial system of two of the antennas would also be an issue.
Your thoughts?
Bill KH7XS/K4XS (soon to be V31XX)
Location of the station is V31 and interest is contesting and DXing
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