[SECC] K9AY receiving loop--Anyone using one?

[Bill Coleman]

On Sep 8, 2006, at 12:06 PM, K9AY wrote:

> Practical issues with K9AY Loops (and EWEs, flags and pennants) mainly
> involve their location. As Ed noted, coupling
> to the TX antenna can pick up a lot of noise and kill the directional
> pattern -- the same can happen with other towers, aluminum siding,  
> stucco
> with metal mesh underneath, etc.

How far away is far enough away?

> The good news is that all you need are some wire, a 9:1 transformer  
> (any
> good Beverage XFMR will do), a 390 or 430 ohm 2-watt resistor, and  
> one or
> two relays to switch one or two loops.

Is the amount of wire critical? I think the original design was 85  
feet of wire. Are smaller loops effective? Is the shape of the loop  
critical? I'm thinking of draping the loop across a small tree.

Also, on the ground rod -- I've read articles that placing a  
counterpoise under the loop is just as effective -- thoughts?

> Any more questions? I'll be glad to offer my free (and worth every  
> penny of
> it) advice.

It's well worth the price!

Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Quote: "Not within a thousand years will man ever fly!"
             -- Wilbur Wright, 1901