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

["Curt Olson" flipov411]

Thank you, Mike and Klas!

Curt Olson

Mike Feldman wrote:

> On 06 Jun, 2008, at 12:12 PM, Curt Olson wrote:
>
>> And are the two resistors per channel series or parallel?
>
> Yes the two resistors are in series and in parallel --
> in series as viewed from XLR pins 2 and 3, and in
> parallel as viewed from the source of 48 volts.
>
>                       +------/]/]/]/]/]/]--------- 2
>                        |
>         +---------+      2x 6800 Ohms (comma free!)
>          |             |
>     +   |            +------/]/]/]/]/]/]--------- 3
>        48 vDC
>      -   |
>          +---------------------------------- 1
>
> That probably won't line up very well in everyone's mail reader.
>
> By the way it's worth it to match the pair of resistors as closely
> as you can.  I bought a bag of a hundred and spent some time
> with a 4 1/2 digit DMM sorting them into several piles.

Klas Strandberg wrote:

> 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.