Topband: The band sans noise

[Mike Waters]

I forget what the Pixel Loop looks like. But if it's anything like a tuned,
link-coupled circular loop in the vertical plane with a 20 dB preamp at the
loop, it will have two very deep nulls at a very low angle.

I made three like that ~35 years ago, between 1 and 4 feet in diameter,
made from small coax and two different sizes of CATV hardline. They worked
fantastic for nulling out a single, local noise source! But they were
worthless for incoming sky wave signals, exactly like the models show.

1. What does the Pixel Loop do better than these and other loops?
2. What does the Pixel Loop's preamp do to improve the S/N ratio???
3. And what IS its RDF?

The preamp I used is described here:
www.w0btu.com/W0BTU-broadband-preamps.html

73, Mike
www.w0btu.com

On Fri, Apr 22, 2016 at 12:42 PM, Rob Atkinson <ranchorobbo at gmail.com>
wrote:

> ... we tested that antenna and saw its performance first hand...
> K5UJ
>
> On Fri, Apr 22, 2016 at 11:26 AM, JC <n4is at comcast.net> wrote:
> > ...   PIXEL loop is a low RDF and LOW
> > performance receiving antenna, it is really snake oil.
> > In tests, the Pixel magnetic loop provided at least 20 dB null off the
> > sides.  From my experience, that is much better "filtering" than what
> > would be had with a horizontal loop.   Of course it isn't all in the
> > antenna itself--a great deal of the success comes from the special preamp
> > designed for use with the antenna.
>