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Re: Advice on antenna building project



Robin, and Justin,
I have a 70 cm QFH (Quadrifilar Helix antenna) working I used a 1 Wavelength 
long design. It works great and when tuned to AO-51 I hear it for most of 
the pass. Just set the squelch on the radio and set frequency to 435.310 and 
work stations when the bird is in view. no keps necessary!
Art, KC6UQH
(Taking the path of least resistance)

----- Original Message ----- 
From: "Robin Callender" <robin_callender@hotmail.com>
To: "Justin Burket" <zorton@jtan.com>; <amsat-bb@amsat.org>
Sent: Tuesday, September 06, 2005 7:51 PM
Subject: Re: [amsat-bb] Advice on antenna building project


> Hi Justin,
>
> About 8 months ago, I built a QHA to receive weather satellite images.
> I used the "Tall Narrow QHA" design (just google for this phrase).
> It was suprisingly easly to build and has worked out quite will for me.
> It took about one weekend to build (light weekend work).
> This assumes you're comfortable with soldering copper tubing.
> (If you go to http://foldedtoadfroth.blogspot.com , towards the bottom you 
> can find a picture of this QHA.)
>
> I just started a new job, but as soon as things settle down I want to 
> build a 70cm QHA.
> I have heard that they are a little more demanding, but not too much.
> Here is a link to an inspirational QHA site which has some 70cm designs 
> http://www.jcoppens.com/ant/qfh/index.en.php
>
> I have also been contemplating what it would take to build a L-band QHA.
> Some interesting bits can be found at 
> http://www.jcoppens.com/ant/qfh/fotos_gps.en.php
>
> I say "go for it" and build either antenna or both antennas...its a cheap, 
> fun way to gain some experience!
>
> 73s
> Robin   KE7ARL
>
>
> ----- Original Message ----- 
> From: "Justin Burket" <zorton@jtan.com>
> To: <amsat-bb@amsat.org>
> Sent: Tuesday, September 06, 2005 10:18 AM
> Subject: [amsat-bb] Advice on antenna building project
>
>
>> Good day,
>>
>> I've been toying with the idea of putting up a either a discone or quad 
>> helix antenna here at my QTH.  I currently live in an apartment and don't 
>> have the money nor the room to put up a full rotatable setup.  I began to 
>> look into various antennas that I could homebrew and think the discone or 
>> quad helix would be one of the best bets.
>>
>> Has anyone on the list worked with either of these antennas?  What are 
>> the advantages or disadvantages of each?
>>
>> And finaly, does anyone have construction information?  I'm hoping to 
>> homebrew something.
>>
>> 73,
>> KL1RL
>> Justin
>> ----
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> ----
> Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
> Not an AMSAT member? Join now to support the amateur satellite program!
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----
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