Brian Several years ago I had a Casablanka ceiling fan which was mounted in a location where the sun would hit it. During spring and autumn the sun was in a position so the sunlight would shine through the blades then reflect off a white wall and illuminate a small SCR night light. The blades chopped the light causing rapid on/off switching of the SCR. The resulting pulsed RFI drove me nuts for three years. The pulse frequency was a function of fan RPM. Change your fan speed and see if it effects your situation.
Doug Hudson K7CUU ________________________________ From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> on behalf of Brian Hunt <huntin...@coastside.net> Sent: Friday, December 15, 2017 2:51:06 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Ceiling fan interference Sounds like a pulse width modulation controlled variable speed DC motor. Their website doesn't give any details other than the DC motor. There is a tech support link on their website you could query them. Similar to the problems hams have with the new high efficiency furnaces? I have one of those that I tamed with some ferrite clamp-ons on the thermostat line. 73, Brian, K0DTJ > On Dec 15, 2017, at 14:14, VE3NFK <john.turgo...@gmail.com> wrote: > > Hi > > I have a very nice living room ceiling fan "Aeratron 50 in. Indoor Silver 3 > Blade Ceiling Fan" > super high efficiency, very low power and quiet BUT severe radio > interference 15 khz spacing especially on 80, 40, 160 on my K3 and KX3. > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to d_hud...@outlook.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
