Topband: NCC-2 antenna pattern?

[Richard (Rick) Karlquist]

I did exactly the same thing as what Tree describes.  It worked pretty 
well using just a Kenwood TS-570 as the 2nd receiver.  Getting a really
deep null on the loop requires attention to various details:

1.  RF leakage into the feedline
2.  Nearby metallic objects messing up the pattern of the loop
3.  The loop must be fairly small for a good null
4.  The so-called "N6RK loop" with varactor tuning cannot be used as is. 
  Instead, fixed capacitors must be used to tune it.

It was somewhat debatable as to how much the SO2R operation improved my 
contest score.

Rick N6RK

On 12/17/2023 11:12 AM, Tree wrote:

> 
> I have been successful with in-band receiving on 160 with a loop antenna
> about 800 feet away from the TX vertical with the null parked on the TX
> antenna.  On 20 meters, I have done it with about 500 feet separation.
> It's obviously a lot easier with low power (like used in the NAQP).  The
> 
> Tree N6TR
>