Re: [Elecraft] OT noise on 17m

[n9tf]

Here's noise from my neighbors new washing machine (Samsung).  
http://www.slickpic.com/users/GeneGabry/albums/N9TFHamStationPhotos/?wallpaper&viewer#11792105
 
Repeats about every 17Khz. From about 20Mhz-22.5Mhz. Most of all the RF 
pollution in my neighborhood generates garbage on 15m. Have not seen any yet of 
17m. At least the washing machine garbage only lasts for about 60 minutes two 
to three times a week (when I'm in the shack on 15m). 
  
Just wait until buck/boost DC-DC converters and switchers are deployed more 
prolific at 1Mhz and higher. Company I work for makes the line choke and power 
inductors used in those switchers. They are worse noise generators than the 
lower frequency switchers 50khz-500khz. It's only going to get worse :( 
  
Gene, N9TF  

From: "HankP"  
To: "Robert G Strickland"  
Cc: "Elecraft"  
Sent: Friday, March 11, 2016 12:46:56 PM 
Subject: Re: [Elecraft] OT noise on 17m 

The stuff I have run into that is in the 16 to 18 khz range includes furnace 
/air conditioner  motor controls and  washing machines. 

Of course those are intermittent which is also a clue- although 
there are some furnace/A/C blowers that stay on at low speed all 
the time for circulation.   

If you have a P3 - decrease the span  and most of the newer stuff 
at certain parts of the cycle will actually be several spikes in 
each group of noise. 

Hank K7HP 



   


- Original Message - 
Can someone help me understand the "noise" on 17m - and elsewhere - 
right now? It repeats every 17kc, very strong. Perhaps some sort of over 
the horizon radar? Is it general or just something in my neighborhood? 
Thanks much. 
...robert 
-- 
Robert G Strickland, PhD ABPH - KE2WY 
rc...@verizon.net.usa 
Syracuse, New York, USA 
__ 
Elecraft mailing list 
Home: http://mailman.qth.net/mailman/listinfo/elecraft 
Help: http://mailman.qth.net/mmfaq.htm 
Post: mailto:Elecraft@mailman.qth.net 

This list hosted by: http://www.qsl.net 
Please help support this email list: http://www.qsl.net/donate.html 
Message delivered to pfizenma...@q.com 
__ 
Elecraft mailing list 
Home: http://mailman.qth.net/mailman/listinfo/elecraft 
Help: http://mailman.qth.net/mmfaq.htm 
Post: mailto:Elecraft@mailman.qth.net 

This list hosted by: http://www.qsl.net 
Please help support this email list: http://www.qsl.net/donate.html 
Message delivered to n...@comcast.net 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] OT noise on 17m

[David Anderson]

Coincidental I think hi. Yes Aurora on 144 MHz here this afternoon and the 
magnetometers showing the impact too.

73 from David GM4JJJ

> On 11 Mar 2016, at 19:01, KENT TRIMBLE  wrote:
> 
> Robert . . .
> 
> *Space Weather News for March 11, 
> 2016*http://spaceweather.com
>  
> 
>  *
> 
> UNEXPECTED GEOMAGNETIC STORM: *  Earlier today, the outskirts of a CME 
> previously expected to miss Earth instead /hit/. The impact sparked a 
> G2-class geomagnetic storm and bright auroras around the Arctic Circle.   At 
> the time this alert is being written, the storm is still in progress.   Visit 
> Spaceweather.com 
> 
>  for updates.
> 
> 
> 73,
> 
> Kent  K9ZTV
> 
> 
>> On 3/11/2016 8:41 AM, Robert G Strickland wrote:
>> Can someone help me understand the "noise" on 17m - and elsewhere - right 
>> now? It repeats every 17kc, very strong. Perhaps some sort of over the 
>> horizon radar? Is it general or just something in my neighborhood? Thanks 
>> much.
>> ...robert
> 
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to gm4...@yahoo.co.uk
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] OT noise on 17m

[KENT TRIMBLE]

Robert . . .

*Space Weather News for March 11, 
2016*http://spaceweather.com 
 
*


UNEXPECTED GEOMAGNETIC STORM: *  Earlier today, the outskirts of a CME 
previously expected to miss Earth instead /hit/. The impact sparked a 
G2-class geomagnetic storm and bright auroras around the Arctic 
Circle.   At the time this alert is being written, the storm is still in 
progress.   Visit Spaceweather.com 
 
for updates.



73,

Kent  K9ZTV


On 3/11/2016 8:41 AM, Robert G Strickland wrote:
Can someone help me understand the "noise" on 17m - and elsewhere - 
right now? It repeats every 17kc, very strong. Perhaps some sort of 
over the horizon radar? Is it general or just something in my 
neighborhood? Thanks much.

...robert


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] OT noise on 17m

[HankP]

The stuff I have run into that is in the 16 to 18 khz range includes 
furnace /air conditioner  motor controls and  washing machines.

Of course those are intermittent which is also a clue- although 
there are some furnace/A/C blowers that stay on at low speed all
the time for circulation.  

If you have a P3 - decrease the span  and most of the newer stuff
at certain parts of the cycle will actually be several spikes in
each group of noise. 

Hank K7HP 



  


- Original Message -
Can someone help me understand the "noise" on 17m - and elsewhere - 
right now? It repeats every 17kc, very strong. Perhaps some sort of over 
the horizon radar? Is it general or just something in my neighborhood? 
Thanks much.
...robert
-- 
Robert G Strickland, PhD ABPH - KE2WY
rc...@verizon.net.usa
Syracuse, New York, USA
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to pfizenma...@q.com
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] OT noise on 17m

[Jim Brown]

Yet another example of a switch-mode power supply.  Here's a preliminary 
version of k9yc.com/KillingReceiveNoise.pdf  that might help.


73, Jim K9YC


On Fri,3/11/2016 6:41 AM, Robert G Strickland wrote:
Can someone help me understand the "noise" on 17m - and elsewhere - 
right now? It repeats every 17kc, very strong. Perhaps some sort of 
over the horizon radar? Is it general or just something in my 
neighborhood? Thanks much.

...robert


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] OT noise on 17m

[David Anderson]

Bob,

Most probably a switched mode power supply somewhere locally, almost everything 
we see repeated at regular frequency intervals like that are harmonics of SMPS. 
Often up to VHF unfortunately :-(

Have you tried switching off the house breaker and listening on batteries to be 
sure it isn't self inflicted?

It could be anything from a mobile phone charger to a grow light ballast. 

73 from David GM4JJJ

> On 11 Mar 2016, at 14:41, Robert G Strickland  wrote:
> 
> Can someone help me understand the "noise" on 17m - and elsewhere - right 
> now? It repeats every 17kc, very strong. Perhaps some sort of over the 
> horizon radar? Is it general or just something in my neighborhood? Thanks 
> much.
> ...robert
> -- 
> Robert G Strickland, PhD ABPH - KE2WY
> rc...@verizon.net.usa
> Syracuse, New York, USA
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to gm4...@yahoo.co.uk
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] OT noise on 17m

[ab2tc]

Hi,

None of it here in Camillus (a suburb west of Syracuse).

AB2TC - Knut



--
View this message in context: 
http://elecraft.365791.n2.nabble.com/OT-noise-on-17m-tp7615093p7615096.html
Sent from the Elecraft mailing list archive at Nabble.com.
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] OT noise on 17m

[Robert G Strickland]

Can someone help me understand the "noise" on 17m - and elsewhere - 
right now? It repeats every 17kc, very strong. Perhaps some sort of over 
the horizon radar? Is it general or just something in my neighborhood? 
Thanks much.

...robert
--
Robert G Strickland, PhD ABPH - KE2WY
rc...@verizon.net.usa
Syracuse, New York, USA
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com