[ARC5] Adventures in Battery Ops - filters - LEDs

[Chris Bowne]

Here in CT and nearby RI the local utilities have a subsidy program which supports places like Home Depot selling certain maize LED bulbs at a discounted price.  We replaced all of our 60 watt incandescents with Cree equivalents that draw something like 9 watts for less than 5 bucks each.  So far no EMI issues with them even where my HF coax feed is very close to the light at the back door to the garage.

Sent from my iPhone

> On Apr 11, 2015, at 7:53, Bill Cromwell <wrcromwell at gmail.com> wrote:
> 
> 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.
> 
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