Hi John, Possibly the undercounted LEDs or their power supply are defective and should be replaced. I have about 30 LED light bulbs of various types in my house and I have not experienced any issues with an increase in the noise floor.
73, Bob Nobis - N7RJN [email protected] > On Feb 1, 2016, at 20:48, johnpierce <[email protected]> wrote: > > My kitchen, under cabinet lights, are LEDs. With those lights turned on my > noise floor changes from -128db to -102db. If the circuit is changed to a > different phase the noise improves by 6db. All of this at 7mhz and other > higher bands. Needless to say the AM broadcast band is highly affected by > the LEDs. > > > > Placing a type 31 core with three turn of the AC line feeding the LED power > supply and a clamp on 31 core on the LED side of the power supply provides > no improvement! I do not have an oscilloscope to look at the waveforms. > But given what I have done, why is there no improvement? I was following > recommendations provided by NK7Z. > > > > AD2F, John > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
