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Re: Large Diaphragm mics in low temperatures

Subject: Re: Large Diaphragm mics in low temperatures
From: "Klas Strandberg" klasstrandberg
Date: Fri Jan 26, 2007 6:39 am ((PST))
Rob, Bruce - I think that the NT1A is the only large diaphragm mic 
which DOES work under most conditions. The CAD 179 doesn't, for example.

KLas.

At 08:18 2007-01-25, you wrote:

>At 2:51 PM -0700 1/24/07, Bruce Wilson wrote:
> >Before I perform the experiment with my NT2000's, does anyone have
> >experience with large diaphragm mics at very cold temperatures (-15 to -5
> >C)? I'd hate to have a diaphragm contract enough to break or permanently
> >stretch.
> >
> >Bruce Wilson
> >http://science.uvsc.edu/wilson
> >
>
>I don't think there's a big risk other than learning more about your
>mics "personalities." I've set out my two sets of NT1-A's when its
>well under zero degrees (F) for days at a time on probably a dozen
>occasions with no ill effect.  Its dry at those temps. However,
>another set of NT1-A's the school owns will eventually emit a high Hz
>whine after several hours.  One of my NT2000's (2500's serial number)
>will produce a predominantly low Hz "roar" after several hours of
>exposure to cold, moist air, but my other NT2000 (5900's), sitting
>along side, remains unaffected.  All of the "bad" mics have recovered
>once dry and warm and show no damage such as failing sooner the next
>time.  My hope is I can find a higher serial number mate for my good
>NT2000, but I fear I might be rolling dice. With those I have tested,
>the mic tends to be resistant or not. Perhaps there are unique
>factors/tolerances in mics that a scientist of your caliber could
>account for! ;-) Rob D.
>
>
>--
>Rob Danielson
>Peck School of the Arts
>University of Wisconsin-Milwaukee
>http://www.uwm.edu/~type/audio-art-tech-gallery/
>
>
>
>"Microphones are not ears,
>Loudspeakers are not birds,
>A listening room is not nature."
>Klas Strandberg
>Yahoo! Groups Links
>
>
>

Telinga Microphones, Botarbo,
S-748 96 Tobo, Sweden.
Phone & fax int + 295 310 01
email: 
website: www.telinga.com
         






"Microphones are not ears,
Loudspeakers are not birds,
A listening room is not nature."
Klas Strandberg

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