I have had difference experiences than Jim. When the rain static is horrible
(at the level where is sounds like the drumming section in a large marching
band ;-) the the top yagi is always the loudest in Ierms of hearing rain
static, it is NOT the only one that gets it and that has been true whether it
has been 10, 15 or 20 meters. What happens at my qth is that the top is the
loudest by far, the 2nd one down is moderately loud, the 3rd one down has some
static and the 4th one down (bottom) is quiet.
With lower levels of rain static, the top is still the loudest but the 2nd and
3rd one down may not experience any.
I use 5L Hygain HG205CA, 155CA and 105CA’s.
73
Bob, KQ2M
From: Jim Thomson
Sent: Wednesday, December 05, 2018 12:50 PM
To: towertalk@contesting.com
Subject: [TowerTalk] Rain drops noise on Yagi (dipole)
Date: Wed, 5 Dec 2018 11:03:12 -0500
From: "john@kk9a.com" <john@kk9a.com>
To: towertalk@contesting.com
Cc: guidoted@gmail.com
Subject: Re: [TowerTalk] Rain drops noise on Yagi (dipole)
<The rain static solution is in the towertalk archives 1 Apr 1997
http://lists.contesting.com/_towertalk/1997-04/msg00023.html
<John KK9A
## Its always the very top yagi, regardless of how many yagis on the same
tower. The lower yagis never seem to be affected.
Perhaps the..fix is to install the smallest yagi you can get away with..at the
very top of the tower..or mast above the tower...
that will kill the rain and or wind static..or st elmos fire..or whatever the
heck is actually causing it. The top ant does not need coax either.
Perhaps something like a 1-2-3 el 10m yagi..or TA-32, TA-33, or just enough
aluminum at the very top to kill the noise to the actual
yagis below it, that are being used.
## I have heard the same story at least a doz times now..even if they are DC
grounded eles... like a Hy gain 204BA. .
Its always the very top yagi that gets the noise..and never the lower yagis.
Some type of sacrificial top...yagi / al may well do the trick.
Jim VE7RF
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