From: gherold@teachspin.com   
      
   On Tuesday, September 17, 2019 at 5:03:34 PM UTC-4, ABLE1 wrote:   
   > On 9/17/2019 9:03 AM, George Herold wrote:   
   > > On Monday, September 16, 2019 at 6:40:04 PM UTC-4, ABLE1 wrote:   
   > >> Hello,   
   > >>   
   > >> I have experienced what seems to be RF Noise   
   > >> that is generated from LED lighting.   
   > >>   
   > >> I don't have the exact spec's but just wondering   
   > >> if anyone here knows of what to look for as to   
   > >> packaging labels or spec's on LED lighting, if any.   
   > >>   
   > >> The issue just came up today when talking to a customer   
   > >> that has just recently had LED lights in there bar.   
   > >> He says now there is noise that is being heard on the   
   > >> background music speakers it the area for the customers.   
   > >>   
   > >> I can speculate a lot of thoughts on why and how this   
   > >> happens but, would like to know the opinion from   
   > >> the masses here.   
   > >>   
   > >> I did not install the lights or the audio system.   
   > >> Just trying to understand and possibly come up   
   > >> with a solution.   
   > >>   
   > >> Thanks for any input.   
   > >>   
   > >> Les   
   > >   
   > > Some switcher in the LED power supply that has fast edges.   
   > > But first are you sure it's the LED's.  Maybe someone next door   
   > > is making 'noise'.   
   > >   
   > > George H.   
   > >   
   >   
   > Hi George,   
   >   
   > Unlikely "next door".  "Next Door" is easily a couple of   
   > hundred yards away.   
   >   
   > I have not done any investigating on this.  Just going   
   > by what my customer told me.  "Just had LED lights installed   
   > and now the speakers are buzzing."   
   >   
   > First, I am trying to understand the problem for my own edification.   
   > Second, maybe help with a solution.  Again, not my problem to fix.   
   >   
   > Thanks for the input.   
   >   
   > Les   
      
   Well if the buzzing starts and stops when the LED's are switched on and off,   
   then that would be a pretty good indication of the problem.   
      
   Then one has to ask how the interference gets into audio system.   
   Is it over radiated or conducted by the power lines.   
      
   George H.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)