[RFI] likely frequency for LED bulbs?

[wa4tuk]

Greg:

Thank you for posting your results. Information about what makes noise 
and what is (relatively) quiet is hard to find. I will say I am 
surprised. So far I have avoided LED lamps (A19 style) and use a mix of 
incandescent and CFL where appropriate.

I would have thought the switching rate would have been in the 100kHz 
range with harmonics radiating.

Pat
wa4tuk

On 1/9/2015 8:14 PM, Greg Troxel wrote:
>    [build current probe]
>
> Thanks; that should get me far more accurate data than what I did.
>
> Since sending my earlier note, I made some measurements.  I have posted
> them at:
>
>    http://www.lexort.com/blog/amateur-radio.html#sec-5
>
> The quick summary is that all 5 types I have tested are not detectably
> noisy from 160m to 6m, and 3 of 5 cause S1 noise to a 2m receiver with
> the antenna just under 1m from the lamp.  All in all this is a great
> outcome.
>