[ARC5] Adventures in Battery Ops - filters - LEDs

[Bill Cromwell]

Hi,

I have been buying the "Cree" brand LEDs - the "daylight" model - bulbs 
from Home Depot. While everything is subject to change they have been RF 
silent so far. I cannot testify regarding any other brand nor when the 
makers will discover they can make them a half cent *cheaper* by 
eliminating the filtering if it's needed. I can see the power supply in 
some of the LED bulbs and it looks much simpler than those on CFLs. It 
doesn't look like a switcher.

They consume less of the expensive energy and run cooler. They cost 
quite a bit. I am buying two or three every month until I have trouble 
or replace all the other bulbs in my home. ARC-5 and radio content 
follows. I set the antique incandescent bulbs aside for use as dummy 
loads on my transmitters. It's necessary to have some light near my 
command receivers to read those dials. It's good to have efficient light 
that is RF quiet bear our radios.

73,

Bill  KU8H

On 04/10/2015 11:21 PM, Richard Knoppow wrote:
> I think you must mean compact fluorescent lamps.  Halogen lamps are 
> essentially plain old tungsten incandescent lamps.  CF lamps can be 
> extremely noisy.  Older ones were mostly that way but more modern ones 
> seem to be electrically quiet.  Not sure about LEDs. I bought a couple 
> to try in my radio shack.  So far they seem to be quiet.
>