Wow! If I were a member of a committee working group that maintains the
standards of the wiring of three pins, I'd sure be pissed too when somebody
goes and screws them up and gets them all out of order. You've got a big
issue now as it needs to be corrected pronto or renamed a "Pin one or two
problem"!
----- Original Message -----
From: "Jim Brown" <jim@audiosystemsgroup.com>
To: <tentec@contesting.com>
Sent: Saturday, December 18, 2004 12:55 PM
Subject: RE: [TenTec] Orion Mic Woes - Sounds like RFI but Wasn't
> On Sat, 18 Dec 2004 11:30:12 -0500, Tom Wagner wrote:
>
> >The
> >Orion really, really does not like pin 2 to
> >be grounded. (In the Heil setup, pin 1 is the
> >mic lead center conductor and pin 2 is
> >the shield.) This was the cause of the
> >oscillation/instability.
>
> Apparently Heil has never heard of the IEC and AES standards for wiring of
XL
> connectors used for audio. These are international standards. The lowest
numbered
> pin is ALWAYS the shield. Next one or two contacts are audio. These are
not new
> standards -- they have been in existence for more than 50 years. There
were two
> different standards for whether pin 2 or pin 3 was positive polarity with
respect to
> the other. That difference was resolved about 10 years ago. But pin 1 has
ALWAYS
> been the shield contact, and 2 and/or 3 have always carried audio. When
there are
> control circuits, those circuits should be on the higher number contacts.
>
> BTW -- I'm a member of the AES Standards Committee Working Group that
> maintains these standards.
>
>
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