[Antennas] 1/4 wave vert,

Thu Aug 21 23:28:14 EDT 2008

Hi Chris and all,,
Ok heres a question then, for the "Tower" section of this project, 
How about the style of a old farm windmill tower,, Like 10 foot spacing 
on the legs at the base. I wonder how much this would shorten the 
antenna on 80,, 
Plus how would feed such a beast? would feeding (connecting) to just 
one leg work or it be like lopsided.
Now that really would make it ever weirder. How about the same on 10 
meters? the crazy thing is a HUGE percentage of a wavelength wide!
Joe WB9SBD
Chris Boone wrote:
>Just make sure you have a GOOD radial system underneath it...any vertical on
>80 will not radiate worth a flip without the radials...and broadcast
>stations use 120 1/4wl radials...
>Any antenna, wider is broader bandwidth...a caged vertical wider made of
>wires around the vertical support will have a wider bandwidth as they
>emulate a WIDE pipe :)
>Chris
>WB5ITT
>Society of Broadcast Engineers member
>>>-----Original Message-----
>From: antennas-bounces at mailman.qth.net
>[mailto:antennas-bounces at mailman.qth.net] On Behalf Of Jim Miller
>Sent: Thursday, August 21, 2008 11:53 AM
>To: nss at mwt.net
>Cc: antennas at mailman.qth.net
>Subject: Re: [Antennas] 1/4 wave vert,
>>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\
>>>>>