Anyone with KNOWN treadmill exercise equipment RFI screen shots?


Kriss Kliegle KA1GJU
 

Now that the Sun is up earlier, I am up earlier too. I found the QRM again (S-9 at 16kHz spacing) on Super Stations #1, #2, & #3. Last summer I tracked it down to what I believe is the source, a home +500 away from Super Station #1's antenna (nearest antenna),  +600' from #3's, +800' from #4's and +900' from #5's.
Starts in the upper 4MHz band and is noticeable all the way up to 14Mhz. The worst is in the 5 MHz region at S-9 (not a true reading due to using a non calibrated RXR!).
The RFI occurs only in the early AM, 0545-0630 or so with intermittent pauses of 5-10 minutes during the ~45 minutes. Not much of an issue from Fall-Spring, since it's dark and I'm not up. But now the sun is up 05:40 (thank you Simon for the World Map application!) and I find users on the network of servers I host.

I've searched the web for SDR images of "treadmill RFI" and got nowhere.
Attached are two images, one wide and one close up. The swath of RFI ever so slowly drifts in one direction during the emission.

73 Kriss KA1GJU


Dave (NK7Z)
 

If you get one, could you share it? I would like one for my RFI signature files.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/29/21 3:52 AM, Kriss Kliegle KA1GJU wrote:
Now that the Sun is up earlier, I am up earlier too. I found the QRM again (S-9 at 16kHz spacing) on Super Stations #1, #2, & #3. Last summer I tracked it down to what I believe is the source, a home +500 away from Super Station #1's antenna (nearest antenna),  +600' from #3's, +800' from #4's and +900' from #5's.
Starts in the upper 4MHz band and is noticeable all the way up to 14Mhz. The worst is in the 5 MHz region at S-9 (not a true reading due to using a non calibrated RXR!).
The RFI occurs only in the early AM, 0545-0630 or so with intermittent pauses of 5-10 minutes during the ~45 minutes. Not much of an issue from Fall-Spring, since it's dark and I'm not up. But now the sun is up 05:40 (thank you Simon for the World Map application!) and I find users on the network of servers I host.
I've searched the web for SDR images of "treadmill RFI" and got nowhere.
Attached are two images, one wide and one close up. The swath of RFI ever so slowly drifts in one direction during the emission.
73 Kriss KA1GJU


Jerry Lofstead
 

Treadmill noise is from the switching ps.  The pulses vary with the speed of the walker.  Ours covers up to 17 MHZ.  I put Veritas on everything and unable to suppress it.  The chopper wheel puLses the DC to the motor.

Jerrylofstead  W3CDE

On Thu, Apr 29, 2021, 8:19 AM Dave Cole <dave@...> wrote:
If you get one, could you share it?  I would like one for my RFI
signature files.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/29/21 3:52 AM, Kriss Kliegle KA1GJU wrote:
> Now that the Sun is up earlier, I am up earlier too. I found the QRM
> again (S-9 at 16kHz spacing) on Super Stations #1, #2, & #3. Last summer
> I tracked it down to what I believe is the source, a home +500 away from
> Super Station #1's antenna (nearest antenna),  +600' from #3's, +800'
> from #4's and +900' from #5's.
> Starts in the upper 4MHz band and is noticeable all the way up to 14Mhz.
> The worst is in the 5 MHz region at S-9 (not a true reading due to using
> a non calibrated RXR!).
> The RFI occurs only in the early AM, 0545-0630 or so with intermittent
> pauses of 5-10 minutes during the ~45 minutes. Not much of an issue from
> Fall-Spring, since it's dark and I'm not up. But now the sun is up 05:40
> (thank you Simon for the World Map application!) and I find users on the
> network of servers I host.
>
> I've searched the web for SDR images of "treadmill RFI" and got nowhere.
> Attached are two images, one wide and one close up. The swath of RFI
> ever so slowly drifts in one direction during the emission.
>
> 73 Kriss KA1GJU
>






Dave (NK7Z)
 

You might go back in the list looking for treadmill... There have been a few instances of successful suppression of RFI from them, over the years.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/29/21 5:34 AM, Jerry Lofstead wrote:
Treadmill noise is from the switching ps.  The pulses vary with the speed of the walker.  Ours covers up to 17 MHZ.  I put Veritas on everything and unable to suppress it.  The chopper wheel puLses the DC to the motor.
Jerrylofstead  W3CDE
On Thu, Apr 29, 2021, 8:19 AM Dave Cole <dave@nk7z.net <mailto:dave@nk7z.net>> wrote:
If you get one, could you share it?  I would like one for my RFI
signature files.
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
On 4/29/21 3:52 AM, Kriss Kliegle KA1GJU wrote:
> Now that the Sun is up earlier, I am up earlier too. I found the QRM
> again (S-9 at 16kHz spacing) on Super Stations #1, #2, & #3. Last
summer
> I tracked it down to what I believe is the source, a home +500
away from
> Super Station #1's antenna (nearest antenna),  +600' from #3's,
+800'
> from #4's and +900' from #5's.
> Starts in the upper 4MHz band and is noticeable all the way up to
14Mhz.
> The worst is in the 5 MHz region at S-9 (not a true reading due
to using
> a non calibrated RXR!).
> The RFI occurs only in the early AM, 0545-0630 or so with
intermittent
> pauses of 5-10 minutes during the ~45 minutes. Not much of an
issue from
> Fall-Spring, since it's dark and I'm not up. But now the sun is
up 05:40
> (thank you Simon for the World Map application!) and I find users
on the
> network of servers I host.
>
> I've searched the web for SDR images of "treadmill RFI" and got
nowhere.
> Attached are two images, one wide and one close up. The swath of RFI
> ever so slowly drifts in one direction during the emission.
>
> 73 Kriss KA1GJU
>


Dave (NK7Z)
 

Wrong list... I am referring to the rfi@contesting.com list for solutions.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/29/21 6:04 AM, Dave Cole wrote:
You might go back in the list looking for treadmill...  There have been a few instances of successful suppression of RFI from them, over the years.
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
On 4/29/21 5:34 AM, Jerry Lofstead wrote:
Treadmill noise is from the switching ps.  The pulses vary with the speed of the walker.  Ours covers up to 17 MHZ.  I put Veritas on everything and unable to suppress it.  The chopper wheel puLses the DC to the motor.

Jerrylofstead  W3CDE

On Thu, Apr 29, 2021, 8:19 AM Dave Cole <dave@nk7z.net <mailto:dave@nk7z.net>> wrote:

    If you get one, could you share it?  I would like one for my RFI
    signature files.

    73, and thanks,
    Dave (NK7Z)
    https://www.nk7z.net
    ARRL Volunteer Examiner
    ARRL Technical Specialist, RFI
    ARRL Asst. Director, NW Division, Technical Resources

    On 4/29/21 3:52 AM, Kriss Kliegle KA1GJU wrote:
     > Now that the Sun is up earlier, I am up earlier too. I found the QRM
     > again (S-9 at 16kHz spacing) on Super Stations #1, #2, & #3. Last
    summer
     > I tracked it down to what I believe is the source, a home +500
    away from
     > Super Station #1's antenna (nearest antenna),  +600' from #3's,
    +800'
     > from #4's and +900' from #5's.
     > Starts in the upper 4MHz band and is noticeable all the way up to
    14Mhz.
     > The worst is in the 5 MHz region at S-9 (not a true reading due
    to using
     > a non calibrated RXR!).
     > The RFI occurs only in the early AM, 0545-0630 or so with
    intermittent
     > pauses of 5-10 minutes during the ~45 minutes. Not much of an
    issue from
     > Fall-Spring, since it's dark and I'm not up. But now the sun is
    up 05:40
     > (thank you Simon for the World Map application!) and I find users
    on the
     > network of servers I host.
     >
     > I've searched the web for SDR images of "treadmill RFI" and got
    nowhere.
     > Attached are two images, one wide and one close up. The swath of RFI
     > ever so slowly drifts in one direction during the emission.
     >
     > 73 Kriss KA1GJU
     >






Old Roy 78
 

Why should I download SDR Console to my G-33 SDR?

And if it would help me in my DXing how do I download it?

Roy Barstow - Cape Cod - MA.

On 4/29/21, Dave Cole <dave@nk7z.net> wrote:
Wrong list... I am referring to the rfi@contesting.com list for solutions.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/29/21 6:04 AM, Dave Cole wrote:
You might go back in the list looking for treadmill...  There have been
a few instances of successful suppression of RFI from them, over the
years.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/29/21 5:34 AM, Jerry Lofstead wrote:
Treadmill noise is from the switching ps.  The pulses vary with the
speed of the walker.  Ours covers up to 17 MHZ.  I put Veritas on
everything and unable to suppress it.  The chopper wheel puLses the DC
to the motor.

Jerrylofstead  W3CDE

On Thu, Apr 29, 2021, 8:19 AM Dave Cole <dave@nk7z.net
<mailto:dave@nk7z.net>> wrote:

    If you get one, could you share it?  I would like one for my RFI
    signature files.

    73, and thanks,
    Dave (NK7Z)
    https://www.nk7z.net
    ARRL Volunteer Examiner
    ARRL Technical Specialist, RFI
    ARRL Asst. Director, NW Division, Technical Resources

    On 4/29/21 3:52 AM, Kriss Kliegle KA1GJU wrote:
     > Now that the Sun is up earlier, I am up earlier too. I found
the QRM
     > again (S-9 at 16kHz spacing) on Super Stations #1, #2, & #3. Last
    summer
     > I tracked it down to what I believe is the source, a home +500
    away from
     > Super Station #1's antenna (nearest antenna),  +600' from #3's,
    +800'
     > from #4's and +900' from #5's.
     > Starts in the upper 4MHz band and is noticeable all the way up to
    14Mhz.
     > The worst is in the 5 MHz region at S-9 (not a true reading due
    to using
     > a non calibrated RXR!).
     > The RFI occurs only in the early AM, 0545-0630 or so with
    intermittent
     > pauses of 5-10 minutes during the ~45 minutes. Not much of an
    issue from
     > Fall-Spring, since it's dark and I'm not up. But now the sun is
    up 05:40
     > (thank you Simon for the World Map application!) and I find users
    on the
     > network of servers I host.
     >
     > I've searched the web for SDR images of "treadmill RFI" and got
    nowhere.
     > Attached are two images, one wide and one close up. The swath
of RFI
     > ever so slowly drifts in one direction during the emission.
     >
     > 73 Kriss KA1GJU
     >













Dennis Matzen
 

Kriss, my wife has a treadmill and the attached video shows what is does to me. Sounds like what you are experiencing. Lucky for me she does not use it that much. If you want any details on the treadmill I can get them when i get home later this week (I am on the road in  the motor home this week).
--
Dennis
KA6FUB


Bob Dengler
 

At 4/29/2021 03:52 AM, you wrote:
Now that the Sun is up earlier, I am up earlier too. I found the QRM again (S-9 at 16kHz spacing) on Super Stations #1, #2, & #3. Last summer I tracked it down to what I believe is the source, a home +500 away from Super Station #1's antenna (nearest antenna), +600' from #3's, +800' from #4's and +900' from #5's.
Starts in the upper 4MHz band and is noticeable all the way up to 14Mhz. The worst is in the 5 MHz region at S-9 (not a true reading due to using a non calibrated RXR!).
The RFI occurs only in the early AM, 0545-0630 or so with intermittent pauses of 5-10 minutes during the ~45 minutes.
Could also be a washing machine with variable speed drive. See if the 45 minute cycle length is consistent.

Bob NO6B


Kriss Kliegle KA1GJU
 

I have documented clothes washer RFI from my own Whirlpool Duet washer (2007? Vintage). That varies with speed of the rotor, this is QRM is much more stable vs variable speed washing machine RFI.

73 Kriss KA1GJU 


Joe Pereira
 

This is a capture of a treadmill nearby to me, a bit different to what you see

Joe
VK5EI


Stewart G3RXQ
 

I have a treadmill in an outbuilding. It is a wide band jammer -  par excellence.

On inspection there are absolutely no EMI suppression components built in.

So much for EMC Market Surveillance/Enforcement by our UK "Regulator" Ofcom.

Stewart G3RXQ


Dennis Matzen
 

Kriss I am back home so as promised here are the details on my wife's treadmill.

MFG: ICON Health & Fitness Inc
Model: Pro-Form 500i
Model #: 831.29604.1

Has a UL sticker but of course no FCC sticker
--
Dennis
KA6FUB


Kriss Kliegle KA1GJU
 

Any SDRC images of RFI in the HF spectrum?

Thanks!

Kriss KA1GJU 


Dennis Matzen
 

Kriss, here is a link to a YouTube vide of the QRM in SDRC.

https://youtu.be/MQ0nbKTWe3I

--
Dennis
KA6FUB


Kriss Kliegle KA1GJU
 

Sure looks like what I got!
Any plans on rectifying the QRM?

A quality AC line filter perhaps?

An FT240-31 with numerous wraps of the power cord through it?


73 Kriss KA1GJU 


Dennis Matzen
 

Was not going to worry about it as the wife does use the treadmill much.

But I think it will be a good project to try options on reducing or eliminating the QRM. Will let you know how it goes. 
--
Dennis
KA6FUB