Re: [Elecraft] LED Lamps and HF RFI?

2015-05-11 Thread David Gilbert
LEDs are low voltage DC current driven devices, and those in the K3 are easily driven from the internal supplies. LED bulbs used in residential lighting each have a power supply in their base that has to efficiently drop the 120 VAC source down to low voltage DC current, and that pretty much r

Re: [Elecraft] LED Lamps and HF RFI?

2015-05-11 Thread Craig Smith
You are wise, Ted, to be cautious about this. As you implied, it is not the LEDs themselves but how they are driven. LEDs are current driven devices and, for a given intensity, are typically driven by a constant current source. In the case of a panel LED in a K3 or whatever it is easy to do t