Well ... a 2 horse motor (output) will be consuming about 1.5 Kw if operating at its maximum rating. Even if not maxed out it is likely to be well over the ratings of any commercial line filter that we are likely to find.
Localizing the source is no problem. It is the treadmill. If the common mode and differential mode conducted noise in the line cord going to the wall can be suppressed then the noise is contained to the treadmill. My homebrew approach worked for me but the point about liability is well taken. The only completely safe way to handle the noise may be to add a few pounds of ferrite to the line cord to suppress the common mode HF current. Just kidding .. same problem of liability .. or at least blame for whatever problems the user may perceive. My guess is there is not really anything to be done. In years past I was an avionics EMI hunter and I just cannot resist the temptation to comment. But I'm done now. Don K7FJ >> I would look around for some type of commercial line filter that could >> be placed in the line. > > Before purchasing a line RFI/EMI filter, the noise path and manner of > propagation requires investigation. If RFI radiation is occurring as a > result of coupling from a power supply or display module (for example) > onto > a cable wiring harness but is not associated with the AC line path, then > adding a line filter is a wasted expense. > > Techniques used for investigating and localizing a noise path can be found > in the RFI mail list archives. > > Paul, W9AC > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
