[TowerTalk] SteppIR Defaults

[Tony]

Larry,

For what it's worth, I have the 3 element SteppIR at 70 feet and the 
factory default gives very low SWR on all bands.

The antenna is 3 years old and the only swr change I see is when the 
tower is lowered; probably due to coupling with near-by objects / 
ground. Have you tried homing the elements or calibrating the antenna?

Tony -K2MO


----- Original Message ----- 
From: "Larry Comden" <lcomden at comcast.net>
To: "TowerTalk" <towertalk at contesting.com>
Sent: Sunday, February 10, 2008 9:19 AM
Subject: [TowerTalk] SteppIR Defaults


> TTers,
>
> I have a 2 ele SteppIP up 50'. The default element lengths require 
> very little adjustment on 17, 15, 12 and 10M. But on 20 and 6M they 
> seem to be way off indicated by unacceptable SWR of over 3 to 1. 
> Example: the driven element for had to lengthened about 12 inches from 
> the default or more than 10% to get acceptable SWR in the recent ARRL 
> VHF test. The director was then set 5% shorter than the new DE length.
>
> On 20 I've always had to use a tuner to get acceptable SWR
>
> Do not have any gain or F/B values to report.
>
> Has anyone else seen this? Suggestions welcome.
>
> TIA
>
> Larry K3VX
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