Great work Don.
It's always interesting to see what others have done to address issues as this.
Thanks for sharing.
All my very best,
Mike WH6YH
Sent from my iPad
>
> Treadmill combination filter update.
>
> Today I replaced the 10 amp commercial filter with the 20 amp version of
> the filter, and the results are similar. Below are a few measurements on
> 160 meters and 80 meters showing how effective the combination of the two
> filters are (14 turn toroid choke, and commercial filter model 20DRGG5 made
> by Delta) in reducing my treadmill RFI.
>
> *1.8068 Mhz*
> No Filters : 19db over S9
> With Filters : S7 which is my noise floor
>
> *1.8291 Mhz*
> No Filters : 15db over S9
> With Filters : S7 which is my noise floor
>
> *3.5250 Mhz*
> No Filters : 28db over S9
> With Filters : S6 which is my noise floor
>
>
> *3.5475 Mhz*
> No Filters : 25db over S9
> With Filters : S6 which is my noise floor
>
> The 3.5250 Mhz readings indicate the filter is knocking the signal down at
> least 46db (and probably more).
>
> 73,
> Don (wd8dsb)
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