[RFI] Smoothfitness 6.25 Treadmill RFI

Sun Sep 25 11:36:44 EDT 2016

Lionel,

Great solution, but if it is not your treadmill and it is radiating next door or down the block, you'll need the manufacturer or dealer to step up with the cooperation of your neighbor.

Those can be difficult challenges.

73,

Gordon Beattie,  W2TTT 

201.314.6964

Sent from AT&T Mail on Android

From:"Lionel Booth" <lionel1049 at outlook.com>
Date:Sun, Sep 25, 2016 at 11:28
Subject:RE: [RFI] Smoothfitness 6.25 Treadmill RFI

I resolved my Smoothfitness RFI problem with a combination of a Delta line filter and a FT240-31 toroid.  These are installed in a 6 x 6 x 4" Carlon box sitting next to the mill.  I kept the AC line from the filter to the mill short.  The improvement as best I can tell is better than 4o dB reduction in noise, and it was BAD.  The RFI is essentially undetectable with the treadmill in the next room about 15 feet away. 

I intend to connect thru the toroid only that has 9 or 10 turns and see how much the Delta is adding.  The toroid probably should have more turns and it's a $20 solution whereas the Delta is roughly $45 from Mouser.  

> Date: Sun, 25 Sep 2016 07:17:57 -0700
> From: w2ttt at att.net
> To: ny9h at arrl.net; ny9h at arrl.net
> Subject: Re: [RFI] Smoothfitness 6.25 Treadmill RFI
> CC: jb1589 at att.com; rfi at contesting.com; w2ttt at arrl.net
> 
> Bill,
> 
> Treadmills are notoriously noisy and impact all sorts of services from radio and TV to xDSL.  Really tough to get a reasonable solution in place because the users don't correlate their device use to your problem and aren't really motivated to engage in a resolution.  Further, the manufacturers buy subassemblies from overseas suppliers who are largely unaccountable and also unmotivated.  
> 
> Forward the case to Mike Gruber, W1MG at the ARRL and cc me if you are truely stuck.
> 
> 73,
> 
> Gordon Beattie, W2TTT
> 
> 201.314.6964
> 
> 
> 
> Sent from AT&T Mail on Android
> 
> From:"Bill Steffey NY9H" <ny9h at arrl.net>
> Date:Sun, Sep 25, 2016 at 9:50
> Subject:Re: [RFI] Smoothfitness 6.25 Treadmill RFI
> 
> the "smoothfitness" brand is one of  MANY by ICON HEALTH & FITNESS...
> 
> IFIT & BOWFLEX and they make for many others....
> I'll bet over 50% of the treadmills sold in USA..    
> 
> They probably all use the same design PS, with different power levels...
> My wife wore one out !!
> Maybe some ham in Salt Lake , Our ARRL could contact them,
>                           1 place to cure all that terrible noise.
> 
> My old next door neighbor, would fire up the plasma for Oprah, & jump 
> on the treadmill....  I even asked her if she treadmills with Oprah 
> every morning
>   Yes &  how did I know?????.
> 
> 
> bill
> 
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