Topband: Looking for 160m narrow beam RX advice - an interesting combination of ideas

[Lloyd Berg N9LB]

I have received many suggestions and ideas on this subject.

Finding a single RX antenna system that nulls the neighbor noise sources 
at 90 and 270 degrees is proving to be a challenge.

Greg has offered an interesting idea that would integrate noise 
canceling/nulling technology with a traditional RX receive antenna 
system.  Possibly providing a "best of both worlds" solution.  I want to 
share this idea with this group to see if others have any experience 
with this proposed solution.

I could place a "noise antenna" next to each neighbor, mix the 
equal-length feed lines together ( in phase ) for the noise source null, 
and then place the actual receive antenna (in-line verticals, loops, 
K9AY or Shared Apex ) right in the very center of my yard ( 
centered/equidistant from the noise antennas ).

Has anyone used multiple noise antennas feeding a single noise canceling 
device?

Has anyone cascaded/combined a noise canceling device such as the NCC-1 
or MFJ-1026 with a traditional short RX vertical(s) array or loop(s) or 
K9AY or Shared Apex?

Thank you and 73

Lloyd - N9LB


On Tue, Jan 6, 2015 at 10:55 AM, Greg Chartrand via Topband wrote:

> Looking for 160m narrow beam RX advice (Lloyd Berg - N9LB)
>  I had a similar situation about 15 years ago with my next door 
> neighbor who had something in his house that was giving me S9 raspy 
> noise 24x7. I could not find the source in his house but I suspected 
>  his doorbell transformer that was buried inside a wall of his house. 
> The noise precluded all DX on 160 not to mention everything else. 
> I purchased an MFJ-1026 and had a sense antenna directly between my 
> vertical (receiving antenna) and his house. I was able to completely 
> null out the noise from his house right down to atmospherics. I worked 
> a lot of DX using the 1026 and about 4 years later the noise went away 
> without explanation. 
> You can put up flags, loops, pennants... whatever but none of them 
> will have a null anywhere near what you can do with a 1026 and sense 
> antenna .... assuming that the noise source appears as a single point. 
> You can verify this using a portable AM radio and using the loop-stick 
> antenna in it to null the noise. If it nulls well, the 1026 would be a 
> good investment.  
>
> Good luck!Greg
> _________________
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