|
|
|
|
dynamic mic in to a soundcard
In article writes:
What? Let me re-word what you wrote here so that you can see how you
contradicted yourself:
Layout of XLR cable:
Pin 1 = Ground
Pin 2 = Hot (Phase)
Pin 3 = Cold (Neg Phase)
So you just contradicted yourself by saying that between 1 and 2 works but
not hot and ground.
Hold on a bit before you start throwing around your insults. That's
the layout of an XLR for a conventional balanced microphone connected
to a conventional mic preamp, with or without phantom power.
Phantom power is applied between pins 1-2 (1 is minus, 2 is plus) and
also between pins 1-3 (1 is minus, 3 is plus). Therefore, there is no
potential difference, hence no applied voltage, between pins 2 and 3,
the signal leads for the microphone.
The "bias power" input that we're discussing here is unbalanced, and
there's voltage between the signal lead (on the input jack) and the
ground, or low side. Now in order to make a conventional microphone
work with that input, you need to connect pins 2 and 3 to the input
jack, pin 2 to the hot terminal, and pin 3 to the low, or ground
terminal. Now, you have the bias voltage appearing between pins 2-3 of
the microphone, putting voltage across the transformer, or the coil if
there's no transformer.
Where Pin 1 comes into play here is that normally carries the cable
shield on the XLR, and the cable shield is also connected to the low
side of the unbalanced input jack. So Pin 1 is connected to Pin 3.
So where's the contradiction?
--
I'm really Mike Rivers - )
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me he double-m-eleven-double-zero at yahoo
|