Ceiling fan interference

[VE3NFK]

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.

Anybody with any experience with these?  They are DC motors, RF ? remote
control units (but it only emits when you use it).

Thanks!

72/3 John VE3NFK





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[Brian Hunt]

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 <[hidden email]> 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.
>
>

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[Douglas Hudson]

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: [hidden email] <[hidden email]> on behalf of Brian Hunt <[hidden email]>
Sent: Friday, December 15, 2017 2:51:06 PM
To: [hidden email]
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 <[hidden email]> 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.
>
>

______________________________________________________________
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[Jack Brindle-2]

Remember that the receiver is on all the time, as is the low-voltage supply that is powering the receiver. All can cause problems in addition to the fan PWM that the receiver is driving.

Good luck solving this one. There is not much room in the fan enclosure for ferrites to help resolve the issues and adding capacitors at the appropriate places can be a real challenge. I hope
returning the controller is still a solution for you even if it means taking the fan down…

73,

Jack, W6FB

> On Dec 15, 2017, at 4:14 PM, VE3NFK <[hidden email]> 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.
>
> Anybody with any experience with these?  They are DC motors, RF ? remote
> control units (but it only emits when you use it).
>
> Thanks!
>
> 72/3 John VE3NFK
>
>
>
>
>
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

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