[Elecraft] LED Lamps and HF RFI?

[Fred Townsend]

I am a RFI engineer so naturally I test everything I can get my hands on. I have been pleasantly surprised at how good the LEDs are. I have seen one infant mortality for which the manufacturer replaced after a 3 week wait. With CFLs I have seen some noise. One was a 150W equivalent. I had to look a long time to find that large a CFL and when I did it was a no name company. It pretty much wiped out all HF bands so I was forced to go to a 100 watt equivalent.

Everything is made in China now days but the usual caveats apply. By American   
brands. They will backup their products.

Fred, AE6QL

-----Original Message-----
>From: "Dauer, Edward" <edauer at law.du.edu>
>Sent: May 11, 2015 7:13 PM
>To: "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
>Subject: [Elecraft] LED Lamps and HF RFI?
>
>Had an electrician at the operating QTH today to discuss replacing the
>recessed ³can² lighting throughout the house.  He suggested replacing the
>incandescent cans (now 65 watts per bulb) with LED lamps (same lumens with
>10-13 watts per bulb).  I have looked at the Internet on the question of
>RFI from LED bulbs and see wildly inconsistent reports.  It is the case
>that HF radios like the K3 have LEDs in their panels; but I would be
>installing as many as 60 LED fixtures running at 10-13 watts each.  My
>caution comes from my novice days in the 50s when a single fluorescent
>lamp put my hamming out of business - things were quiet when the only
>light source was the filament of a 6146 and the dial lamps on the HQ-100.
>I know that LEDs aren¹t at all the same; but I don¹t want to relamp the
>house if it puts me off the air.  And if they (or their power supplies) do
>generate RFI in the HF bands, would the K3¹s NR get rid of it?  Anyone
>have any good data on this?
>
>Tnx,
>
>Ted, KN1CBR
>
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