[TowerTalk] m2 6M7 SWR change with rain

[Steve Katz]

That's actually not much of a change.  Probably due to water droplets
forming at the tips of the elements.  50.125 to 49.900 is only less than 1/2
of 1% change in resonance, not bad.

I'd just tune the antenna for 50.200, so when it "drifts down" in frequency,
it's still resonant within the band.  

I have the same antenna and the SWR is very good across at least 300 kHz,
from 50.0 to 50.3  -- which is all I need.  "Perfect 1:1" doesn't make it
work better...

-WB2WIK/6

-----Original Message-----
From: Hector Garcia XE2K [mailto:j_hector_garcia at sbcglobal.net] 
Sent: Friday, July 27, 2007 1:42 PM
To: Tower Talk
Subject: [TowerTalk] m2 6M7 SWR change with rain

Hi guys:

A friend   just install the 6M7 in his  office tower 
and he report that his antena in the last rains the
swr change from the perfect 50.125 1:1  to 49.9 1:1
when the antena is WET , just dry and the SWR back  to
50.125

I have a 6M7JHV in the box to be installed  at 150ft
and really i will like to know if adding some clear
spray or paint to the driven will reduce or eliminate
that problem of SWR change when WET.

any solve the problem ?  any solution  avaliable

or just live with that ?


Hector 

Hector Garcia XE2K / XF1K
   Mexicali B.C  DM22fp
P.O.Box 73 
El Centro CA 92244-0073
USA
http:// www.xe2k.net
http://www.dxxe.org
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