[TowerTalk] Interaction Issues

Don W7WLL w7wll at arrl.net
Mon Apr 10 12:32:50 EDT 2017

I moved my A3WS 12/17 down from 8 feet above the TH7 to 6 feet and saw zero 
change in the performance or SWR of either.


-----Original Message----- 
From: Jim Thomson
Sent: Monday, April 10, 2017 8:19 AM
To: towertalk at contesting.com
Subject: [TowerTalk] Interaction Issues

Date: Sun, 09 Apr 2017 18:05:59 -0400
From: n8de at thepoint.net
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Interaction Issues

Totally agree with John, as the BOOM of the 6m yagi is the culprit!


##  I was going to suggest putting the 6m at top of mast, warc yagi in the 
then the C3 at the bottom..with all booms pointed in the same direction. 
IE: highest
freq yagi at the top, then next lowest freq yagi, etc.

##  But I suspect you might get more interaction with the C3 close to any 
17+12 warc yagi.   The 12m portion could interact with the 10m portion of 
the C3.
Ditto with the 17m portion interacting with the 20 + also 15m portion of the 

##  For min interaction,  warc at top,  6m in middle, and C3 at bottom, but 
with all
booms  pointed in the same direction.   So all he really needs to do is 
rotate the 6m
yagi  90 degs.

Jim  VE7RF


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