On 24/11/2014 20:33, Tom Miller wrote:

"Jeff Layman" wrote in message
...
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. 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?

--

Jeff

You might try winding the AC lines through a ferrite RFI core like the ones
found on switching power modules. Some can be clamped around the wires. You
will want to get all three leads through the core, L, N, and Ground. Maybe
even do a couple of turns if the core is large enough.

I'll try that. Thanks.

--

Jeff