The cause is probably that the first input transistor distorts the signal
when the input is too high. As when you use a Telinga with an old recorder=
(like the Tascam DAP1) without the -20 db attenuation.
The attenuation needs to be made before the input of the recorder. As it is=
unbalanced, this can easily be made with two resistors only.
It doesn't help to reduce the gain of the recorder. The signal is already
distorted.
Klas.
At 04:16 2006-01-22, you wrote:
>At 11:36 PM +0000 1/21/06, John Hartog wrote:
> >
> >
> >I then switched the NT1-As to the PMD-670 and it did not work well at
> >all. I didn't have time to remove the panel and switch on the
> >high-pass or the mic attenuator or otherwise mess around with
> >settings, but at least I know it's not from the mics physically
> >shaking from the ground rumbling as I had originally suspected from
> >previous occurrences of the problem. Here's a snapshot of the
> >distorted waveform:
> >http://www.rockscallop.org/test/670distort.JPG
>
>Hi John--
>I believe there is discussion on Oade Bros forum about limited
>headroom on the 670 mic pre.
>
> >
> >Next I tried the rh-10 with the Shure 183s shoulder mounted, and that
> >combination also created horrible distortion no matter what the gain
> >setting or the mice sensitivity setting. Though the problem cleared up
> >when I left the booming roar of the cave.
>
>Seems similar to what has been reported several times. Cause is still
>unexplained to best of my knowledge. Several folks have reported it
>does not seem to happen with sharp MD's. So maybe use your Sharp when
>its loud?
>
> >
> >And finaly, I tried the rh-10 with the ms-907, set up exactly the same
> >as previously with the mz-n707. I sounded fine for about two seconds,
> >and then distortion set in.
>
>This happening with another PIP mic on HiMD could be consistent with
>Curt's theory that something is going on with high level in using
>PIP power on the HiMD mics pre. I have not gotten bottoming out with
>HiMD using the Rolls- just as you experienced. Rob D.
>
>
> >Of course as usual, more investigation is due, and all
> >comments are welcome.
> >
> >-John Hartog
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >"Microphones are not ears,
> >Loudspeakers are not birds,
> >A listening room is not nature."
> >Klas Strandberg
> >Yahoo! Groups Links
> >
> >
> >
> >
>
>
>--
>Rob Danielson
>Film Department
>University of Wisconsin-Milwaukee
>
>
>"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:
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