[RFI] LED Bulbs

[Jim Brown]

On 2/10/2014 11:57 AM, EDWARDS, EDDIE J wrote:
> Just FYI.  Automatic light timers can also generate noise all by themselves.  We had one my wife bought for our Christmas lights that made noise all over the HF bands.

Remember that common mode chokes formed by winding a suitable number of 
turns of the radiating cable through a #31 or #43 Fair-Rite core can 
suppress much of this trash. In this sort of application, I would choke 
both the 120V and LV DC lines, following the guidelines in 
http://k9yc.com/RFI-Ham.pdf Radiation of the differential mode component 
can be significantly reduced by using twisted pair for both 120V and LV 
DC lines.

73, Jim K9YC