[RFI] 6 Minutes - a record?

Dale Svetanoff svetanoff at earthlink.net
Sun May 20 20:51:15 PDT 2012


Please do us a favor and list make and model of the fan.  Frankly, I am a
bit surprised about a ceiling fan causing RFI, but I suupose anything is
possible.  I say that because I have 5 ceiling fans in my house and all
have straight induction motors - they are "RF quiet".  Speed change is
accomplished by switching the number of poles within the motor.  

Does this fan use solid state speed control?  It would be interesting to

73, Dale

> [Original Message]
> From: Gerald Wolczanski <jerrywolczanski at earthlink.net>
> To: <RFI at contesting.com>
> Date: 5/19/2012 7:14:20
> Subject: [RFI] 6 Minutes - a record?
> Scott (transistor at charter.net) assisted me in chasing down an RFI
> problem that was wiping out portions of the 40 meter CW band.  I finally
> traced it to a sailboat dual-battery charger that was keeping my boat
> batteries charged in the off-season.
> Unplugging the unit did not make the interference immediately go away.
> Indeed the RFI did not go away until roughly 6 minutes after I unplugged
> the charger (batteries were still connected to the charger).
> Scott asked that I share this with the RFI folks.
> So, that took care of my RFI problems until I installed a new ceiling
> fan in the bedroom yesterday.  I confirmed it was the fan by shutting
> off the CB for the bedroom.  I'm going to build the "brute force AC
> filter" described in the ARRL handbook and put it into the AC line
> feeding the unit (up in the attic).
> 73
> Jerry W
> Warrenton, VA
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