[RFI] likely frequency for LED bulbs?

[Roger (K8RI)]

So far, I've replaced about 7 CFLs with 60 to 100 watt equivalent LEDs.  
Two 120 watt floods in the garage.  I just took them off the shelf at 
Lowe's and Ace.  There are natural light and warm white.  No noise from 
any has been detected so far.  I need to bring the spectrum analyzer in 
for a thorough check.

73

Roger (K8RI)


  On 1/10/2015 12:37 AM, wa4tuk wrote:
> 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.
>>
>
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