[TowerTalk] quad design

[Tom Sessions]

Mike is so right.  Whether you use formulas by hand or modeling
(essentially the same thing except the computer does the math), you are
probably going to have to make adjustments to get the SWR "resonance" 
and/or FB you want.  On the other hand, you might get lucky and get it what
you want the first time.

73,
tom K4RV

> [Original Message]
> From: Michael J. Castellano <km1r at cshore.com>
> To: <towertalk at contesting.com>
> Date: 3/22/2004 15:03:23
> Subject: [TowerTalk] quad design
>
> you dont really have to go through the modeling route.
>
> simply make the driven element 1 wavelength at the intended frequency,
and the reflector 5% longer. 
>
> You can feed it directly with 50 ohm line or if you are a purist, use a
balun of some sort.
>
> Gain will be good, F/B acceptable, and it is simple, quick and cheap.
>
> The ARRL boom length of 13 feet is good, but your existing 12 foot boom
will be fine, and might not be 
> worth the mechanical trouble of lengthening. (Dont think you will really
notice a difference in actual use)
>
> 'I'll probably get flamed for this, but in my opinion, we are 
"reinventing the wheel" by modeling everything.
>
> The textbook approach works fine, although some final adjusting might be
in order.
>
> Been building quads the old fashioned way for decades... 1 wavelength,
reflector 5% longer... it works!!!!!
>
> Good luck with it, hope to hear you on Field Day...!!!
>
> 73, Mike KM1R
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