With only 5,6 mV / Pa I am certain that you get MD preamp noise.
You need too much gain.
That is what I would like to discover: At which output / Pa does a typical
MD preamp noise "take over".
Klas.
At 04:44 2005-09-01, you wrote:
>At 5:07 PM -0700 8/31/05, Dan Dugan wrote:
> >Lou Judson wrote:
> >
> >>Curiosity took me to the Soundprofessionlas website this morning, and I
> >>see they have some closeouts on their stereo pairs already wired for
> >>PIP - $49 instead of 129. Has anyone compared theirs to such as the
> >>Shure 183s? Ths ones on sale now are cardioid, yet for some of what I
> >>do they would be ideal.
> >>
> >>http://www.soundprofessionals.com/cgi-bin/gold/item/SP-CMC-22
> >
> >It was Sound Professionals who turned me on to the 183s, just before
> >they changed to something else.
> >
> >Sharon Perry uses SP cardioids, which are Audio-Technicas, for her
> >vest. Gain is about the same as 183s, but the cables are quite
> >microphonic. Don't know if that's the type they're currently using.
> >
> >If the s/n of "58" is correct, 94-58 = 36dB, pretty high.
>
>and a (lower) sensitivity of 5.6mV/Pa (high mV/Pa #
>[sensitivity.output] is good; low dB(A) # [self noise] is good.)
>
>compare to:
>Panasonic WM61a capsule 32.5 dB(A)* 18 mV/Pa **
>spec sheet: http://tinyurl.com/8g4l9
>Cost $16.21 for 10 + shipppiing http://www.digikey.com/ and enter
>"wm-61a" into parts search.
>You can solder a workable set to run on MD/HiMD plug in power for a
>few bucks more http://webpages.charter.net/tidmarsh/binmic/
>
>*Based on Eric B's test on file on the micbuilders list.
>http://tinyurl.com/8tkt4 **Is this sensitivity number right? Eric's
>test seems to confirm Panasonic's figure of (0dB=1V/Pa, 1kHz)
>-35+/-4dB.
>I need to learn how to make this conversion.
>
>and for reference:
>ShureWL-183 22 dB(A) 29 mV/Pa
>Rob D.
>
>
>--
>Rob Danielson
>Film Department
>University of Wisconsin-Milwaukee
>
>[Non-text portions of this message have been removed]
>
>
>
>
>"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:
________________________________________________________________________
________________________________________________________________________
"Microphones are not ears,
Loudspeakers are not birds,
A listening room is not nature."
Klas Strandberg
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