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Re: DIY Phantom Power (was: fostex fr-2le high frequency noise)

Subject: Re: DIY Phantom Power (was: fostex fr-2le high frequency noise)
From: "Klas Strandberg" klasstrandberg
Date: Fri Jun 6, 2008 11:55 am ((PDT))
Clarification, I see language problems here...

Altogether 4 resistors - all 4 connected together at one end, which
is connected to + of the batteries.

Two of the resistors go to pin 2 and 3 of one XLR and the other two
to pin 2 and 3 of the other XLR. Pin 1 of both XLR's are connected to
ground and minus of the batteries.

Piuh, hope this is correct English now...

Klas.

This is it!

One resistor goes from + of the batteries to pin 3 of the XLR and the
other from + of the battery to pin 2.
Then the same arrangement to the other channel.

Klas.

At 19:12 2008-06-06, you wrote:
>Klas Strandberg  wrote:
>
> > 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.
>
>Thank you Klas,
>
>Just to clarify...
>
>Do you mean 6.8k resistors? (You put a comma in there.)
>
>And are the two resistors per channel series or parallel?
>
>Curt
>
>
>------------------------------------
>
>"While a picture is worth a thousand words, a
>sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause
>Yahoo! Groups Links
>
>
>
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S-748 96 Tobo, Sweden.
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email: 
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