>
>
>But we don't want people to think there aren't
>promising options for quiet, reliable phantom
>powering.
I am not sure that I understand you correctly.
Of course there are such options, but how do we know?
I don't think I would have observed my FR2 noise if Lindsay hadn't
pointed it out first. Not before I ended up in perfect conditions!
Perhaps missed a "perfect" recording!
And I am not sure that Lindsey would have observed it, if it had
started instantly when he switched the recorder on. Not before....
There are ways to make good powering and I was sure that the Fostex
FR2 was okay. It wasn't.
I now understand better the Sony guy whom I asked why the TCD-D10
didn't have phantom power. He said that it was better for Sony if
other manufacturers had to solve that problem, by selling separate
power boxes.
So there are reasons to be suspicious. I don't want people to get
noisy recordings. And if they do, I don't want them to blame Telinga for it=
.
Anyway, I just tested the PRO6 handle with the SD702 and it works just perf=
ect.
Klas.
>So far with mkh30, 40, 80, mbho 603's, AT3032's
>and NT1A's, both my Rolls PB224 and my Art
>Phantom II portable phantom power supplies have
>not produced performance variations I could
>detect through long hours under -10 degree to 90
>degrees in high humidity. I run the units only on
>12 volts, not the 9 volt batteries -- a possible
>factor. I keep the units out of the elements but
>give them no other special precautions. Rob D.
It might be a device that works. Congrats! / Klas.
> >
> >At 19:01 2007-03-21, you wrote:
> >>At 6:07 AM -0700 3/21/07, umashankar wrote:
> >>
> >> >
> >> >i think the culprit in all these is the switched mode phantom power
> >> >and probably the best thing would be an outboarded phantom power. it
> >> >does not always have to be 48 volts - depends on the mike of course,
> >> >but i have run oktava mko12 (a simple resistor for the condensor DC
> >> >voltge) on 18 volts with only a small loss in sensitivity.
> >> >
> >> >umashankar
> >>
> >>This possibility goes way back in our discussions. I bought the parts
> >>to make up one that supplied 48 volts via multiple batteries with
> >>Klas' help on the schematic. A few weeks later, Eric Benjamin tested
> >>my Rolls PB224 portable phantom power supply and reported that the
> >>noise level was probably insignificant even with the best gear. This
> >>was also consistent with my test comparing the NT1-A->744 (phantom)
> >>vs NT1-A-> Rolls PB224 ->744 (non phantom). As the Rolls is only
> >>$70USD, the need for a battery-only unit became lower, but no A/B
> >>test has been done to the best of my knowledge.
> >>
> >>If any one has a battery-only-powered phantom supply they could send
> >>me for a few days, I'll run an A/B test. The NT1-A's will run fine on
> >>30 volts. 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
> >Yahoo! Groups Links
> >
> >
> >
>
>
>--
>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
|