What filter was this by number please?
--
Thanks and 73's,
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On Mon, 2015-01-26 at 20:19 -0500, Don Kirk wrote:
> 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)
>
> On Thu, Jan 8, 2015 at 8:11 AM, Don Kirk <wd8dsb@gmail.com> wrote:
>
> > For many years my wife's treadmill caused strong interference on 160
> > meters when it was in use, and yesterday I was able to completely eliminate
> > the RFI using a combination of two different filters. I created a simple
> > website that documents my tests and the filters used, and for those
> > interested the website URL is http://sites.google.com/site/treadmillrfi/
> >
> > The website contains a link to a video on youtube where you can actually
> > see the effectiveness of the filters.
> >
> > 73,
> > Don (wd8dsb)
> >
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