Dave,
I've been looking at one of these. Do you use it in conjunction as a noise
antenna for a noise canceler or alone? What if the signal you are trying to
hear is in the null zone? I assume you have a small rotor for it?
Dale, k9vuj
On 22, Mar 2014, at 11:22, "David Harmon" <k6xyz@sbcglobal.net> wrote:
> Because these noise cancellers did not work very well for me and required
> constant fiddling I got a Pixel magnetic loop.
> These units have the ability to null out plasma noise as well as being
> non-responsive to power line type noise.
> It is a receive only antenna about 40" in diameter mounted on a 10' conduit
> in the yard.
> It is portable as well....I can disconnect the coax and walk away in 26
> seconds.
> It has a broad band amp at the loop and I use a 18db DXE amp under the desk
> to get the received signal equal to the main antenna.
> The directivity increases as the frequency goes up.
> It is expensive....$500 but if bought direct from Pixel it has a 30 day no
> questions asked money back guarantee if you are dissatisfied in any way.
> It is the difference between going permanently off the air or continuing to
> operate.
> I cannot stress how well this thing works.
> It took my 20/9 noise to S1.
>
> 73
>
> David Harmon
> K6XYZ
> Sperry, OK
>
> -----Original Message-----
> From: RFI [mailto:rfi-bounces@contesting.com] On Behalf Of Jerome Schatten
> Sent: Saturday, March 22, 2014 11:06 AM
> To: rfi@contesting.com
> Subject: Re: [RFI] Noise cancellers....
>
> @Jim Brown..
>
> What you say is of course true -- you can only kill one at a time. That
> said, you can often times choose your target, by adjusting the phasing.
> Getting rid of the most offensive noise source will usually allow you to be
> reasonably operational again -- my goal.
>
> If you use two antennas that are both capable of good tx performance, then
> you have an additional weapon: switching the two antennas around.
> You can do this by installing a dpdt switch in the unit and doing a little
> rewiring.
>
> The main PITA with cancellers is the time you spend getting the adjustments
> right.
>
> Out Dammed Noise!
>
> jerome - va7vv
>
>
> On 14-03-21 11:20 PM, Jim Brown wrote:
>
>
> [...]
>>
>> Note that ANY noise canceller can only work on noise arriving from one
>> direction at a time. If you have multiple sources, you can kill only
>> one of them at a time.
>>
>> 73, Jim K9YC
>>
>>
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