Re: XLR to mini for Camcorder Audio
- From: Mike Rivers <mrivers@xxxxxxxxxxx>
- Date: 28 May 2007 13:45:10 -0700
On May 28, 3:57 pm, "soundmark" <AUDIOFR...@xxxxxxxxxxxxx> wrote:
The mic input puts out some DC bias of a few volts on both left and right
channels relative to ground.
So what can I solder onto this adapter on pin 2 and pin 3 to block the
voltage that will fit nicely into a small cable assembly?
First, check the manual for your recorder and see if it's possible to
turn off the mic power. Many devices that offer plug-in power for a
mic have a way to disable it, but it may be on a menu somewhere.
A 20 uF 6 volt electrolytic capacitor between the tip of the mini plug
and pin 2 of the XLR should do the job. Pin 3 and Pin 1 should go to
the shield of the mini plug. No blocking required on that lead because
it's at 0 volts relative to the hot signal lead.
You might be able to use a surface mount capacitor and build it right
into the XLR, but they're kind of hard to find in quantities smaller
than about 1,000, and it's hard to tell which end of the capacitor is
+ (which should go toward the voltage source).
.
- References:
- XLR to mini for Camcorder Audio
- From: soundmark
- XLR to mini for Camcorder Audio
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