[Antennas] 1/4 wave vert,

Thu Aug 21 12:52:36 EDT 2008

Joe;
Our 80 meter Hy-Tower customers remove the stubs for 10-40
and add aluminum to the "stinger" on top for a full size 1/4w vertical.
They remove the wire in the center, bond the aluminum to the tower at the
top,
and feed the base section. The 24' of tower adds to the bandwidth
with the aluminum. Centered at 3.650, they use them on the entire
band without any physical stub changes from CW to the DX window.
Regards,
Jim, K4SQR
www.comteksystems.com
Our 19th year of Hybrid Couplers
Comtek, the 4-Square Experts
On 2008年8月21日 08:36:31 -0500 Joe <nss at mwt.net> writes:
> In my younger days when I was a Novice (1975) The best antenna I had 
>> the most fun with was a full sized 1/4 wave vertical for 80 meters. 
> I'm 
> thinking of putting up another before winter hits again.
>> But here's a question, Like Hy Gains Hy-Tower there are stubs that 
>> stick out along the tower to make it resonate on all the bands. 
> Quite 
> simple and elegant.
>> The RF energy simply looks to the part of the tower that "Fits" for 
>> minimal SWR. Makes total sense. 80 meters being a band where 
> bandwidth 
> on almost any antenna is hard to get, since the percentage of change 
> is 
> so great. I was wondering, If i would make the vertical "Naturally 
>> Resonant" for the bottom of the band,, and then add a stub lower 
> down 
> that would make it resonate near the top. between 3.5 MHz and 4MHz 
>> there is a 8 foot difference in length.
>> I wonder if that would work ?
>> Anyone ever try such a thing? the stubs work great when having 
> large 
> freq differences like changing bands,
>> but would it also work in this situation?
>> Joe WB9SBD
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>>
Jim, K4SQR
www.comteksystems.com
Our 19th year of Hybrid Couplers
Comtek, the 4-Square Experts
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