[600MRG] My local noise - more info...

[John Langridge]

>I have seen tests of others, like MFJ's, on youtube. Some work very well, 
others don't.

I've seen some of these tested and implemented correctly and incorrectly in the past.  the circuits are not rocket science so I think more often than not the problems that exist involve 1) last of a proper "noise" antenna that can actually hear the noise in question - it has to be able to do this if it is to phase it out and 2) the noise can't be in the direction that the noise antenna resides with respect to the main antenna.  These seem to work pretty well from what I have seen and have considered one here recently as the noise floor appears to be headed upward.  I think most recently KL7L was using one in conjunction with his K9AY loop to manage the noise from the electric fence, IIRC.

73 and good luck,

John XIQ



________________________________
 From: Kenneth G. Gordon <kgordon2006 at frontier.com>
To: Neil Klagge <w0yse.7 at gmail.com> 
Cc: 600m group <600mrg at w7ekb.com> 
Sent: Sunday, September 22, 2013 11:58 AM
Subject: Re: [600MRG] My local noise - more info...
 

On 22 Sep 2013 at 5:19, Neil Klagge wrote:

> Ken ,  I think u wud benefit from a noise canceling circuit that has a
> sensing antenna and uses a phasing circuit to cancel local noise. I
> found one at a swap meet that works even below 500 Kc. U might have to
> build one from a schematic. It works good on local noise.
> 
> Neil Klagge 

I've thought about those things a lot, Neil. In fact, I have a circuit board from 
FAR circuits for one that was published in QST a long time ago. I've also 
looked at the offering by Time Wave, which to my mind is about the best one 
out there, but its cost is pretty high for me....even so I might spring for it 
anyway.

I have seen tests of others, like MFJ's, on youtube. Some work very well, 
others don't.

Well, I do know that I can probably do something about the noise. What I 
would really like to do is to move to a place with at least 10 acres on top of a 
5000 foot mountain within walking distance of town and its amenities.

Sure...

Ken W7EKB

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