It's easy Curt - connect 4 or five 9v batteries in series. Connect
minus to ground.
Then connect two 6,8k resistors per channel from the +pole of the
battery to pin 2 and 3 of the XLR's.
The resistors need to be 2% matched if you are going to connect a
dynamic microphone or a microphone with an output transformer. If the
resistors differ, like one is + 5% and the other -5%, then current
will go through the coil / transformer winding and - worst case -
cause damage.
Klas.
At 15:29 2008-06-06, you wrote:
>umashankar wrote:
>
> > ... i generally try and run the phantom supply from a string of nine
> > volt batteries, still the quietest way of going about it. and many
> > mics actually are quite happy with anything over 12 volts so it is
> > worth checking out to see how many batteries ou have to string.
>
>I've been curious about this for a long time. Would you be willing to
>describe or diagram the circuit, or point out a web page? (I've
>searched a couple times with no luck.)
>
>Curt Olson
>
>
>------------------------------------
>
>"While a picture is worth a thousand words, a
>sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause
>Yahoo! Groups Links
>
>
>
Telinga Microphones, Botarbo,
S-748 96 Tobo, Sweden.
Phone & fax int + 295 310 01
email:
website: www.telinga.com
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