I had previously mentioned that I have three LED lamps and hadn't noticed any noise. Looking (listening) more closely, I have noticed noise on two of them -- the Sylvania lamps purchased from Lowes. One of them is pretty bad.
I also mentioned that the bulbs were very hot, too hot to handle. Of course, that isn't a direct indication of heat, but temperature. I will likely purchase an AC wattmeter, but if someone has one just plug a fixture with an LED lamp installed and see what it requires. If it's in line with the specs, fine. With the temperature I observed on the surface of the lamp, there must be considerable infrared radiation. Good for heating the house here 9 months of the year -- no inefficiency at all. I also note that the experiment in the You Tube video is measuring noise on the mains line. What about radiated noise? Since the sample is referenced to ground, it might be representative of any radiation. The noise that I observed was affected by my hand in the vicinity of the lamp, surely radiation. Not good. Wayne, N7NG Jackson, Wyoming From: Wayne Mills<[email protected]> Subject: RE: Topband: Home Depot LED bulb interference. To: "'Jim F.'"<[email protected]>, "'top Band'"<[email protected]> Date: Thursday, April 5, 2012, 12:32 PM FWIW: for the last six weeks, I've been experimenting with three LED lamps, 40, 60 and 75 watts, Sylvania and UtilitechPro from Lowes and so far haven't noticed anything on Topband. I even disconnected the shield on the RX input this morning and still don't hear anything. Wayne, N7NG p.s. That 75 watt equivalent lamp seems to put out MORE than 60 watts of heat. It really gets hot. _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
