146/440 MHz verticals can be tuned at ground level and then simply
installed. It's easy to achieve 1/2WL above ground on 146 MHz, that's only
a bit over three feet. I've never noticed any change in tuning at all on
VHF-UHF vertical between ground level and tower level; however, if there is
interaction with the tower due to "side" mounting, that's another issue. If
you keep the antenna far enough away from the tower that it will be nearly
omnidirectional, there shouldn't be any problem at all. -WB2WIK/6
"Success is the ability to go from failure to failure with no loss of
enthusiasm." -Winston Churchill
> -----Original Message-----
> From: K4SB [SMTP:email@example.com]
> Sent: Tuesday, May 11, 2004 6:58 AM
> To: firstname.lastname@example.org
> Subject: [BULK] - Re: [TowerTalk] Adjusting SWR
> > What is the accepted practice to adjust the SWR on a vertical prior to
> > mounting it on the tower? I don't want to install the antenna, and then
> > to remove it for adjustment.
> > I have a dual band vertical (2 meters-440 Mhz) that I intend to side
> mount on
> > my tower, up about 40 feet on a 55 foot tower. I have the antenna on
> > ground, and currently the SWR is high on both bands.
> > Ken
> > W8ND
> Most simple method is to merely climb the tower for 20' feet or so,
> tie a line there and then tie off the other end. Then use the line to
> "hoist" the antenna into the air a few feet.
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
> any questions and ask for Sherman, W2FLA.
> TowerTalk mailing list
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
TowerTalk mailing list