A2 makes buzzing sound

Dustin Liu · Apr 9, 2006

I just got my Surefire A2.

It is great, but recently when playing with my flashlight it makes a buzzing sound if you press just enough to light the incandescent light bulb. Just barely press it so the incandescent light bulb will activate and put it to your ear you might hear it.

Does anyone else have the sound?
Is it a problem?

:huh2::huh2::huh2::huh2::huh2::huh2::huh2::huh2::huh2:

carrot · Apr 9, 2006

This happens to me as well. As far as I can tell, it's the sound from the regulator activating, and appears similar in its nature to the buzzing/humming from the Surefire U2 and HDS EDC. I'm not completely sure what electrical component would make the noise, but it is probably a wire coil or inductor. I wouldn't worry about it.

Dustin Liu · Apr 9, 2006

Thanks for the info

SCblur · Apr 9, 2006

My A2 does this also, pretty normal me thinks

Protaeus · Apr 9, 2006

For the record, my A2 doesnt buzz as far as I can tell....

*places A2 next to ear*

mmmm nope....

planex · Apr 9, 2006

Yes, my A2 makes a very soft buzzing sound when the incandescent lamp is activated. It actually sounds to me to be coming from the tailcap rather than at the bezel. I can't hear it unless my ear is right up against the tailcap.

Flakey · Apr 9, 2006

my u2 is stealthy apparently and makes no noise on any setting ..... maybe there is a bee stuck in your lamp assembly, and the warmth from the incan bulb pisses him off?
:lolsign:

atm · Apr 10, 2006

My Gladius makes a high pitched sound I find very noticeable (and slightly annoying in quiet conditions), particularly on the higher settings. Some folks can't hear it though, maybe it's near the limit of our hearing.

Andrew

SCblur · Apr 10, 2006

Flakey said:
maybe there is a bee stuck in your lamp assembly, and the warmth from the incan bulb pisses him off?

CLHC · Apr 10, 2006

My SureFire L2 will make a low sounding "buzzing" noise when depressed on "low" light setting. Normal, and sure does not bother me none.

Enjoy Your Light! That's All!

LEDMaster2003 · Apr 10, 2006

My A2 doesn't hum. I'll have to check the U2 when I get the replacement tailcap from SF.

(was trying to think of some joke about the A2 actually knowing the words to the song...)

Arkayne · Apr 10, 2006

My battery died soon after my a2 buzzing started. Pehaps you are getting low?

ACMarina · Apr 10, 2006

Mine does, but it's really slight. I'd bet everybody's light is different..

carrot · Apr 10, 2006

Buzzing only happens when I activate the incandescent, presumably during the soft-start phase.

A2 makes buzzing sound

Dustin Liu

Banned

carrot

Flashaholic

Dustin Liu

Banned

SCblur

Enlightened

Protaeus

Enlightened

planex

Newly Enlightened

Flakey

Enlightened

atm

Enlightened

SCblur

Enlightened

CLHC

Flashaholic

LEDMaster2003

Newly Enlightened

Arkayne

Enlightened

ACMarina

Flashlight Enthusiast

carrot

Flashaholic

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