[Lowfer] Lowfer Digest, Vol 207, Issue 4

[Tom Brent]

I've noticed frequently the noise levels being observed and wanted to 
suggest something.  A few years ago I built a phase noise canceller with 
a few slight mods for my own use.  I was so surprised at how well it 
worked I'm hooked.  I won't hardly turn a radio on without it.  I was 
listening for a ndb HIM in sparta TN and the noise was 20 over.  Turned 
on the canceller and reduced the noise to zero.... and then I could hear 
HIM.

So why haven't any of you guys tried this?  I used a mini-whip for the 
sense antenna after experimenting with other types and the results are 
excellent.  Look up "phase X" design on the internet and try it.  Since 
then I've held conversations with people I couldn't hear because of the 
noise.  I don't know why they don't include them all hf radio's to 
augment the noise blanker circuit. You can even reduce broadband noise 
and lightning to some degree. Lightning isn't easy and does not work 
well due to the different places of ignition causing phase differences 
but it works a lot better than you would imagine.

One last thing, you can also use it to boost a signal just like you can 
cancel it.  Works great for AM broadcast weak signals..

Tom, KE4LH    My mod was for auto tx/rx switching and lf/vlf.

On 12/19/2022 6:30 PM, lowfer-request at mailman.qth.net wrote:
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> Today's Topics:
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>     1. Re: Improved watering hole lowfer reception (John Andrews)
>     2. Re: Lowfer KE (KA4SEY)
>     3. Re: Improved watering hole lowfer reception (N8OOU)
>     4. LF and VLF over night (Garry)
>     5. WM This Morning (John Andrews)
>     6. Re: WM This Morning (W4DEX)
>     7. KE and LED noise (W4DEX)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 18 Dec 2022 09:09:23 -0500
> From: John Andrews <w1tag at charter.net>
> To: lowfer at mailman.qth.net
> Subject: Re: [Lowfer] Improved watering hole lowfer reception
> Message-ID: <7431fd2f-d710-6417-7000-f15dd350b189 at charter.net>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> Finally had some sort of copy on signals around 185.300 kHz at home in
> Massachusetts last night. See:
> http://www.w1tag.com/files/18Dec2022.jpg
>
> Times are in UTC, and 800 = 185.300 kHz.
> TAG is clearly visible - there is an interfering line on the left side
> of the screen that isn't normally there, might be a PLC. Traces of WM
> and SIW are visible at their correct frequencies, but a convincing ID
> would be tough to pick out. No sign of SJ last night -- would have been
> off the top of this screen, anyway. Lots of supposed PLC activity near
> the bottom of the screen.
>
> I used an R75 and the old WD2XES transmit loop. A smaller 5' loop has
> only been good for local work this year.
>
> The huge signal blooming up on 185.297 on the right likely comes from a
> neighbor's TV. It clobbers that frequency, and brings up the overall
> noise level around the watering hole. Nothing new -- am suspecting an
> older plasma TV.
>
> John, W1TAG