Howard,
If it were me, and I have a bunch of 240-31’s, I would make a short extension
cord with the cores I have. I’d start with 1, go to 2 if necessary. If you
have to order something, you might as well get the 3” one. Look around, there
may be places cheaper then Palomar.
Good luck,
Joe K1VW
> On Dec 29, 2020, at 8:07 PM, Howard Lester <howard220@gmail.com> wrote:
>
> Very long story short: A particular circuit card (I am guessing so) of my
> 2-1/2 year-old Maytag HE washing machine is susceptible to RFI from… my
> propane-fueled furnace! The symptom is occasional: A loud 2-step snapping
> sound that emanates from parts of the back of the machine’s control panel
> when the furnace first gets the signal from the thermostat, and then begins
> its cycling on. It happens just once in a while, and I can prevent it from
> happening at all simply by unplugging the washer from the AC outlet. What
> could be easier?
>
> When the snapping recently occurred when my 16KW Generac generator kicked on
> for its weekly 5-minute exercising, I got even more suspicious. And when
> yesterday I transmitted with 75 watts on 20 m SSB, using my MFJ Hi-Q Loop up
> in the attic about 15-20 feet away from the washer, and I heard the snapping
> multiple times, I then said, “This means war!” ;-) (That was the first time
> I ever heard the washer do that from me transmitting on any band. I rarely
> use more than 50 watts.)
>
> The flat AC cord is a bit under 1/2” across and has a large plug. The plug
> size requires about a 2” I.D. core, but I cannot find anything specifically
> of Type 31 or 77 or, really, anything — except this:
>
> https://palomar-engineers.com/ferrite-products/AC-Cable-Noise-Filter-for-Large-Plugs-3-ID-p75172171
>
> <https://palomar-engineers.com/ferrite-products/AC-Cable-Noise-Filter-for-Large-Plugs-3-ID-p75172171>
>
> But it’s $40+, and I don’t want to spend that kind of money if it’s not the
> right tool for the job. No, I will not cut the AC cord. The washer is past
> its 1 year full parts and labor warranty, so I’m out of luck there. (Until
> last November, well past the 1 year, I thought all along it was the furnace
> making the snapping sounds.)
>
> Thanks for any ideas. No, I’m not going to replace the washer. As I said, I
> can just unplug the thing except for the few times a week I use it.
>
> Howard N7SO
>
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