WOW ... this is a revelation....!! I've used HyTowers for the past 40 years
and have never heard of this approach which is timely as I'm ready to strip
my stock HyTower down to just 40/80 meter operation...
I'm a little confused at to Tim's explanation......(ie: "Stinger"..??) Has
any one have a sketch of the final 75/80 meter config using Tim's mods..???
-Bill
kc4pe@bellsouth.net
----- Original Message -----
From: "Tim Duffy K3LR" <k3lr@k3lr.com>
To: "'Dan Schaaf'" <dan-schaaf@att.net>; <TowerTalk@contesting.com>
Sent: Tuesday, August 04, 2009 10:33 PM
Subject: Re: [TowerTalk] HyGain HyTower Questions
> Hello Dan!
>
> The original HyTower was designed for the "high end" of 80 meters (above
> 3.9
> MHz). To use it below 3.9 required the addition of the base inductor.
>
> When I decided to build my 80 meter 4 square antennas out of HyTowers
> (stripped of all side stubs) it required extending the 2" section and
> several of the smaller diameters of tubing in order to achieve 0 ohms of
> reactance at 3.510 MHz. The final total height is 75 feet. The large
> diameter reduction from the 24 ft of tower to the aluminum "stinger"
> causes
> the length to be much longer with the HyTower mechanical design than it
> would be if the elements were made from #14 wire (the entire length).
>
> Hybrid fed 4 squares achieve minimum power in the dump load with elements
> that are self resonant lower in frequency (140 KHz in this case). So the
> minimum power is 0 watts in the dump load at 3.65 MHz - with the elements
> tuned for 3.510 MHz.
>
> Here is a photo of one of the 80 meter 4 squares using extended HyTowers
> at
> K3LR http://www.k3lr.com/Vertical/MVC-750X.jpg
>
>
> 73!
> Tim K3LR
>
> http://www.k3lr.com
>
>
>
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of Dan Schaaf
> Sent: Tuesday, August 04, 2009 7:16 PM
> To: TowerTalk@contesting.com
> Subject: [TowerTalk] HyGain HyTower Questions
>
> I am looking to understand how the HyTower can be advertised as a 1/4 wave
> antenna on 80 meters. The standard 1/4 wave length at 3.6 MHz is
> approximately 65 feet, yet this antenna is 53 feet tall on 80 meters.
>
> Vy 73, Dan K3ZXL
> http://www.k3zxl.com
> _______________________________________________
>
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