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Re: [TowerTalk] 40 and 20 at 15 ft apart

Subject: Re: [TowerTalk] 40 and 20 at 15 ft apart
Date: Tue, 30 Aug 2011 17:02:46 -0700
List-post: <">>

You are correct, I had it backwards.   The KLM antennas have the elements 
insulated from the boom,
and Force 12 parasitic elements are connected to the boom.  Thanks for pointing 
it out.   

Yeah, interactions are intriguing.  I have an 80 meter Waller Flag strung up to 
with nulling out some local power line noise on 80.  At first the pattern was 
awful but  now 
is pretty good with a deep null towards the noise.  Discovered that my tower 
was acting as an 
antenna on 80 and throwing the Flag pattern way off.  Also discovered my 
neighbors guy wires
to his old TV antenna were also enjoying being resonant on 80, hihi.  I 
resolved the tower 
resonance and my neighbor was kind enough to let me add some insulators to his 
guy wires
which remedied the situation.  


On Aug 30, 2011, at 1:06 PM, Steve London wrote:

>> The older design tribanders like the KLM KT34's had
>> the parasitic elements
>> electrically attached to the boom and it is almost impossible to achieve a 
>> low interaction regardless
>> of height/orientation.
> Really ? I have a KT-34XA, a KT-36XA and a KT-34A. All elements are insulated 
> from the boom.
> You can get surprising interactions. For example, I have a 2 element wire 
> beam 
> on 80 meters, supported from, and electrically insulated from a 34' boom, 
> attached to the tower. That 34' boom could look a lot like a 20 meter 
> reflector 
> to the KT-36XA that is also on the tower.
> 73,
> Steve, N2IC
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