naturerecordists
[Top] [All Lists]

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 11:43 am ((PDT))
Yes, 6800 Ohms.
One resistor goes from + battery to pin 1 and the other to pin 2.
Then you need another two for the next channel, from + battery to pin 2 and=
 3.

Is this understandable??

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
>
>
>
Telinga Microphones, Botarbo,
S-748 96 Tobo, Sweden.
Phone & fax int + 295 310 01
email: 
website: www.telinga.com






<Prev in Thread] Current Thread [Next in Thread>
Admin

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the naturerecordists mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU