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Re: [Amps] Pin 1

To: amps@contesting.com
Subject: Re: [Amps] Pin 1
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Wed, 27 Oct 2010 16:34:04 -0700
List-post: <amps@contesting.com">mailto:amps@contesting.com>
On 10/27/2010 12:56 PM, donroden@hiwaay.net wrote:
> XLR pin designations
>
> George Washington Bridge.
>     1        2        3
>     G        W        B
>    ground   white    black
>    shield  "+hot"   "- hot"    ( for phasing multiple mikes )
>
> At least that's the way it was before problems happened.

That's exactly right.  AES Standards call for the shield to go ONLY to 
pin 1 of a cable-mounted connector, but to for pin 1 of connectors 
within EQUIPMENT to go to the shielding enclosure. There are VERY GOOD 
reasons for the cable shield NOT going to the shell of the connector on 
the cable, and it has to do with avoiding power-related noise currents 
on cable shields when they are plugged into wiring panels that carry 
audio signals around a facility (like a church, theater, stadium, or 
board room).

The the correct word for "phasing" mics is POLARITY, not phase.  Phase 
is measured in degrees, while polarity is normal or reversed.

73, Jim Brown K9YC

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