On 2014/11/24 4:57 a.m., Jeff Layman wrote:
I have a 6-months old Fantasia ceiling fan (mains powered, with 6-speed

reversible dc motor) which is causing a lot of interference on MW.Â*
FM
is not affected. The interference is there on forward or reverse
rotation, worsens as the speed is increased,, and appears on portable as
well as mains-powered radios.

I can return it to the supplier for replacement or refund, but it is a
bit of a rigmarole to remove and refit. All the electronics are sealed
in, and the only accessible wiring is to the mains connector. Is there
any point in trying some sort of screening or RFI suppression on the
mains wiring before I take it down?


Some ferrite clamp-on filters might help if you can get at the power
lines close to the source...

If the junction box has enough room install a sheilded RFI filter like this:

https://www.digikey.ca/en/products/f...er-modules/838

Select for current, voltage, etc and you will see suitable units
starting around 10USD. I don't know your lines voltage or frequency so
that too you have to plug in...

John :-#)#

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