[Antennas] Fw: Tower alternatives

[JK]

----- Original Message ----- 
From: "JK" <jkolin at optonline.net>
To: <antennas at mailman.qth.net>
Sent: Wednesday, September 30, 2009 2:59 PM
Subject: Re: [Antennas] Tower alternatives


> When using dipoles hung under yagis, you will get a change in SWR and Yagi 
> Pattern distortion. I was able to reduce this phenomonon by de-tuning the 
> dipole using my antenna tuner. I tuned the tuner as it was connected to 
> the dipole for minimum SWR on the yagi! Sounds crazy but it did correct 
> the higher SWR problems on the Yagi that were obviously caused by the 
> dipole hanging under it. I do not know if this method also reduced the 
> Yagi pattern distortion.
>
> I have always found that hanging large wires or other Yagis near other 
> directional antennas would cause degradation of the directional antennas 
> performance. Many hams have antennas hanging too close to other antennas 
> which will affect patterns.
>
> Jay  NE2Q
>
>
>
> ----- Original Message ----- 
> From: <n8de at thepoint.net>
> To: "John Hensley" <w5jv at hotmail.com>
> Cc: <antennas at mailman.qth.net>
> Sent: Wednesday, September 30, 2009 1:23 PM
> Subject: Re: [Antennas] Tower alternatives
>
>
>> Did this many years ago.
>> Good thing:  works fine on 80m & 40m
>>
>> Bad thing:  detuned the yagis above terribly due to harmonic
>> resonances in the guys.
>>
>> I wouldn't do it again.
>> Don
>> N8DE
>>
>> Quoting John Hensley <w5jv at hotmail.com>:
>>
>>>
>>> The feedback on towers has been great.  Thanks again to everyone.
>>> Are there any caveats on using the guy wires as inverted-V
>>> dipoles?If each guy wire had four equally spaced legs, two sets of
>>> guy wirescould be configured as two sets of 80m and 40m inverted-V
>>> antennas180 degrees out of phase on each band.  Has anyone tried this.
>>> John
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>>
>>
>>
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