OT: 20M moving QRM

[k6dgw]

QRN, not QRM.  I can't see what the span is on your panadapter, but it
has all the characteristics of an SMPS ... they're all over the place,
you're probably seeing more than one.

When we were in CA on 5 acres in a rural area, I hosted the neighborhood
wireless on my tower in return for free I'net at the backhaul speed [~90
Mbps].  No problems except a few weak narrowband discrete birdies
[clocks and LO's], and I learned where they were.

They replaced their equipment with new stuff and a new router powered by
a Chinese RPOJ** SMPS in our equipment shed with a 24 VDC line up to the
top of the tower resembling an 80 m Inv-L.  Looked just like your
picture with a wide span on the P3, only MUCH stronger ... in the -70
dBm range on 80, a bit weaker on 40 and 20.  Drifted slowly back and forth.

Since they had a number of neighbors as paying customers and really
coveted the space at the top of the tower, I told them I'd wind chokes
according to the "K9YC Recipe," and watch them install them.  Otherwise
they could put in a "real" linear power supply.  The chokes did the
trick.  If you can find the offending supply(s) which may be nothing
more than wall warts, you might be able to choke the noise out.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org

**RPOJ: Real Piece Of Junk

On Thu, 2016-03-03 at 10:05 -0800, David Ahrendts wrote:
 > Does anyone recognize this moving QRM? Last evening 6:30pm. Band is
 > dead. Ambient noise pretty calm. But notice the slowly moving noise
 > bumps on the K3S SVGA display. Might this be weather radar?   https:/
 > /vimeo.com/157616344
 >
 > David A., KK6DA, LA
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[K9MA]

On 3/3/2016 14:47, Fred Jensen wrote:
> QRN, not QRM
I thought QRN was exclusively atmospheric noise.  Perhaps we need a new
Q code for man-made garbage.

73,

Scott  K9MA

--
Scott Ellington  K9MA
Madison, Wisconsin, USA

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[k6dgw]

Well, consulting the source [ACP131]:

QRN? "Are you troubled by static?"
QRN "I am troubled by static"

QRM? "Are you being interfered with?"
QRM "I am being interfered with"

I suppose "static" could be "interfering with you" as well as another
station, and much of 75 m in the evening probably classes as "static"
regardless of its source. :-)  It's seemed to me that the Q-signals
class QRM as caused by another station and interference from everything
else as QRN, but I'm a retired engineer not a lawyer.  Additions to the
ICAO/ITU standards can be found at www.zerobeat.net/drakelist/missingq.html

73,

Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org

On 3/3/2016 1:11 PM, Scott Ellington wrote:
> On 3/3/2016 14:47, Fred Jensen wrote:
>> QRN, not QRM
> I thought QRN was exclusively atmospheric noise.  Perhaps we need a new
> Q code for man-made garbage.
>
> 73,
>
> Scott  K9MA
>

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[Roy Koeppe]

Re:

" QRN, not QRM
I thought QRN was exclusively atmospheric noise.  Perhaps we need a new
Q code for man-made garbage."


We do have one...in the 'old abbreviations books' -- it's QRNN.      (Young
whipper snappers, anyway).

73,   Roy        K6XK

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[Thorpe, Jeffrey]

I was an engineer, and now a lawyer. I call it "noise".

Jeff - kg7hdz

> On Mar 3, 2016, at 2:45 PM, Fred Jensen <[hidden email]> wrote:
>
> Well, consulting the source [ACP131]:
>
> QRN? "Are you troubled by static?"
> QRN "I am troubled by static"
>
> QRM? "Are you being interfered with?"
> QRM "I am being interfered with"
>
> I suppose "static" could be "interfering with you" as well as another station, and much of 75 m in the evening probably classes as "static" regardless of its source. :-)  It's seemed to me that the Q-signals class QRM as caused by another station and interference from everything else as QRN, but I'm a retired engineer not a lawyer.  Additions to the ICAO/ITU standards can be found at www.zerobeat.net/drakelist/missingq.html
>
> 73,
>
> Fred K6DGW
> - Northern California Contest Club
> - CU in the Cal QSO Party 1-2 Oct 2016
> - www.cqp.org
>
>> On 3/3/2016 1:11 PM, Scott Ellington wrote:
>>> On 3/3/2016 14:47, Fred Jensen wrote:
>>> QRN, not QRM
>> I thought QRN was exclusively atmospheric noise.  Perhaps we need a new
>> Q code for man-made garbage.
>>
>> 73,
>>
>> Scott  K9MA
>
> ______________________________________________________________
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>
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> Please help support this email list: http://www.qsl.net/donate.html
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