- Fan causing MW RFI - 2 Updates
| Brad Johnson <johnsonsatake@gmail.com>: Oct 09 04:32PM -0700 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. > FM you can try and put a AC line filter as close to the device as you can , 3 wire AC feeding is better .... DC motor may need bypass caps , which might be a problem for the 6-speed driver.... The clamp on fairrite or a core should be on everything in a ham home, and all overhead AC drop lines IMO. the type 75 cores are only about $1 and go after all the noise below 1mhz ( that's is where most of it comes from ) you may be able to use the AC line filters on DC if amp rating is enough ( leave a little margin here... ) tips from a solar-powered ham radio operator. pics on my QRZ site Ko6kL |
| Jeff Layman <Jeff@invalid.invalid>: Oct 10 10:40AM +0100 On 10/10/2023 00:32, Brad Johnson wrote: > you may be able to use the AC line filters on DC if amp rating is enough ( leave a little margin here... ) > tips from a solar-powered ham radio operator. > pics on my QRZ site Ko6kL LOL! I posted the original query almost 9 years ago! It was fixed a few days later by using a delta suppression capacitor and ferrite ring large enough to take all the mains leads. -- Jeff |
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