[TowerTalk] frustrating rain and connections... update

[Charles Farr]

I have noted similar changes on my KT-34XA. I've heard that on these 
antennas that water gets into the capacitors on the elements, causing 
the tuning to change. It doesn't last very long after the rain stops. 
Just something I live with when it happens. SWR that is normally 1.5:1 
or less rises to 2 - 2.5. I also experience a lot of precipitation 
static when it rains, snows, etc. I've also heard these effects are less 
on yagi antennas of "plumber's delight" construction. Just observations, 
no real tests, or science.

73
Chuck, W6AJW


On 04/13/2016 07:38 AM, john at kk9a.com wrote:
> I was thinking the same thing. My homebrew antennas have flat SWR well
> below and above the band edges and I have not noticed any change on my
> LP-100A's display when it rains.
>
> John KK9A
>
>
> To:	towertalk at contesting.com
> Subject:	Re: [TowerTalk] frustrating rain and connections... update
> From:	"Joe Subich, W4TV" <lists at subich.com>
> Date:	Wed, 13 Apr 2016 08:23:51 -0400
>
>
> On 4/13/2016 12:09 AM, Bob K6UJ wrote:
> I have always noticed a slight change in the swr with hf yagis when
> it is raining. Just a minimal change though. Nothing like what Gary,
> K9RX reported.
>
> One would expect that the amount of "detuning" would be related to the
> overall "Q" of the antenna.  Antenna designs with critical element
> tuning - particularly DE/D1 - will detune more than designs optimized
> for lower frequency sensitivity (OWA, log-cell, etc.).
>
> The KLM/M2 designs have always been rather "fiddly" when it comes to
> tuning/SWR - specially when compared to some newer designs like the
> OWA, LFA, etc.
>
> 73,
>
>     ... Joe, W4TV
>
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