[TowerTalk] Top loaded tower for 80 and 160m

[Richard (Rick) Karlquist]

Been there, done that.  For many years I have had a
90 foot vertical with 4 30 foot top loading wires
sloping down at 45 degrees that resonate it around
1830.  Without doing anything special, it will also
resonate somewhere around 3660, but that will be
a hi-Z parallel resonance.  It is straightforward to
feed this resonance using a simple LC ladder
network.  The only thing difficult is that you
need to use high voltage rated components.
You will need a few dozen uH and around 500 pF.
The radials won't be needed on 80 meters, so
you can optimize them for 160 meters.

If you only have a 65 foot vertical, with top
loading, the same general principles will apply.

73
Rick N6RK

On 8/15/2018 4:02 PM, kstover at ac0h.net wrote:
> So...1/4 wavelength vertical on 80 meters, 65', and add top loading for 160 or 1/4 wavelength on 160 and try to figure out how to load a 1/2 wave vertical for 80m?
> 
> The property I am buying has a humongous, for me, 150'x210' back yard. The 40-6m tower will be up at the house. It's going to be a crank up 70' tall.
> The planned vertical will be smack in the middle of the sea of green.
> Rohn 25 sections around here are plentiful so that will be the vertical. I just need ideas on which way to go and how to feed it. There will be 60 minimum radials ranging from 75' to 110' long.
> I am limited to one tower and one set of guy lines/anchors in the back 40. There was a terrible price to be paid for the tower next to the house. 😉 a planter will be built around its base.
> 
> Any and all input is welcome.
> 
> 
> R. Kevin Stover    AC0H
> 
> ARRL, FISTS, SKCC, NAQCC.
> “If it doesn’t work the first time you push the button it won’t work the 20th…Just stop.”
> 
> 
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