[Elecraft] RE50B microphone connected to K3

[David Moes]

I guess I misused the term  ground.  vs shield.  I think we are 
basically saying the same thing  just that you are using correct 
terminology,  My Bad.



David Moes
VE3DVY

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>
> --- Original message ---
> Subject: Re: [Elecraft] RE50B microphone connected to K3
> From: Jim Brown <jim at audiosystemsgroup.com>
> To: <elecraft at mailman.qth.net>
> Date: Saturday, 04/02/2012  9:29 AM
>
> On 2/4/2012 8:42 AM, David Moes wrote:
>>
>> E50b is a low z dynamic mic that is well suited to voice and is an
>> excellent mic  should work well for K3.
>
> Yes. An RE11 or RE16 is even better, because they are directional and
> reduce background noise pickup (fans, room noise, etc.)
>
>>
>>      To use this unbalanced you
>> are correct to connect pin1 to pin3   (cold to ground)
>
> Yes, Pin 3 to Pin 1 is right, but Pin 1 is the SHIELD, not "ground,"
> and Pin One must go to the SHIELDING ENCLOSURE (the chassis) to 
> provide
> shielding and prevent "the Pin One Problem."  The distinction between
> "ground" which some interpret (wrongly) as a connection to the EARTH,
> and a connection to the SHIELDING ENCLOSURE is important -- no
> connection to the EARTH is needed to prevent noise or RFI issues.
>
>>
>> do not connect the XLR connector body to the ground it should be left 
>> floating.
>
> Again, this word "ground" confuses the issue.  Inside the microphone,
> there MUST  be a connection between Pin One and the metal shell of the
> mic -- this provides shielding for the mic itself. AES Standards also
> call for a connection between Pine One and the shielding enclosure
> INSIDE EQUIPMENT, but require that there be NO connection between the
> cable shield and the cable shell.  There are very important reasons 
> for
> this that don't matter here. :)
>
> 73, Jim Brown K9YC
>
>
>
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