[RFI] LED RFI solved

Henk Remijn PA5KT pa5kt at remijn.net
Mon Aug 24 07:36:25 EDT 2020


Also in EU we have a lot of lousy PS's, with and without CE or other 
markings.

73 Henk PA5KT

Op 22-8-2020 om 22:42 schreef Bill Steffey NY9H:
> I looked at their website at many of their power supplies.
>
> While they all have FCC ...non have EU.     The Meanwells have EU.  I 
> think the EU standard is either much cleaner spec OR it is enforced, 
> while the fcc spec is probably ignored.  Had same issue with under 
> cabinet kitchen lighting and solution was a Meanwell supply that had 
> EU ( I think they all do). Hanley  might not bother with the EU market.
>
>
> bill
>
> On 8/22/2020 3:24 PM, Michael Aust via RFI wrote:
>> Great video MikeWB6DJI
>>
>> Sent from AOL Mobile Mail
>> Get the new AOL app: mail.mobile.aol.com
>>   On Saturday, August 22, 2020, Jim 
>> Brown <jim at audiosystemsgroup.com> wrote:
>>
>> Thanks for posting, Steve. In today's world, a large fraction of RF
>> noise is electronic noise, NOT power line noise. My tutorial app note
>> addresses this, how to tell the difference, how to chase both types of
>> sources. The two links cover the same material, but the second, slides
>> for a talk, is newer and includes more graphics.
>>
>> http://k9yc.com/KillingReceiveNoise.pdf
>> http://k9yc.com/KillingRXNoiseVisalia.pdf
>>
>> 73, Jim K9YC
>>
>>
>> On 8/22/2020 11:35 AM, VE6WZ_Steve wrote:
>>> A church nearby to my QTH decided to install an LED string to the 
>>> church steeple cross.  The RFI was very bad on 160m.
>>> The problem was a very dirty Hanley LED driver switch-mode supply.  
>>> Replaced with a Mean Well unit and now all is quiet.
>>>
>>> I made a YouTube video showing the isolation, testing and solution.  
>>> Some of these LED drivers are EXTREMELY noisy, but they don't need 
>>> to be!
>>>
>>> https://youtu.be/tvjRwZTNLHs <https://youtu.be/tvjRwZTNLHs>
>>>
>>> 73, de steve ve6wz
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