Arc AAA switching noise

[Ray_of_Light]

I noted a difference between the Arc AAA LE that I own and some other regulated LED light. If you put a PT Matrix LED Head or an Opalec NewBeam close to an AM radio, you can ear the electromagnetic noise coming off the inductive type of step-up regulator. The Arc AAA is totally silent, even at higher frequencies, and this may be regarded as an additional bonus. Does anybody know how step-up regulator works in Arc AAA? I have been able to make capacitor - diode type of inverter that radiates no RF, but they have a painful low efficiency...
Anthony

 

[paulr]

The Arc may just be better shielded.

 

[Rothrandir]

i think paulr is right.

 

[The_LED_Museum]

And I third that notion. /ubbthreads/images/graemlins/grin.gif
Anything that uses a transistor/inductor step-up will produce some radio noise, but I believe the metal casing of the Arc shields most of that and stops it from getting to the radio antenna.

 

[Catapult]

How does the PT Matrix LED compare to the Opalec? I'm thinking the Matrix is dimmer from its advertised runtime of over a hundred hours. I think a hundred hours is a bit too much of an exaggeration, hm?

 

[Flying Turtle]

I think Craig has the answer. My plastic bodied Shorelite and Sauce Light Wand cause terrible interference on the AM band.

 

[Tomas]

Some of those high-frequency devices are horribly noisy.

I have a small four-AAA NiMH AC charger that has a high-freq converter inside. It will take my wireless ethernet LAN off the air if plugged into the same AC circuit as any of the nodes ... /ubbthreads/images/graemlins/ooo.gif

 

[LEDMANIA]

Arc AAA is using step up converter that the frequency is higher than the AM band /ubbthreads/images/graemlins/smile.gif