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From: Phil Allison on 9 Jan 2007 23:02

"BillHart,KarenPierce" <

> Phil Allison wrote:
>
>> ** A genuine e845 has a hum bucking coil - bet this one does not.
>>
>> Linking 1 & 3 will not cause a mic to hum.
>
>
> There are two ways a dynamic mic can get hum. One is magnetic field on
> the coil and a humbucker helps that. Magnetic hum depends on the
> direction you turn the coil. Turning this one had no effect.


** So it actually has a hum bucking coil ?

Or maybe you simply failed to put it near a strong AC hum field.

Nearly any AC supply transformer will do the job.



> The other way is through grounding problems.


** No common ground ( ie earth loop) exist with a dynamic mic on the end of
a lead.


> The setup I was using did
> not have ideal grounding. It was just a mixer and headphones to listen to
> the mics. But an SM57 or OM-5 did not hum and this mic did.


** Sounds like a faulty or badly designed mixer - connecting pin 3 to pin
1 should NOT cause hum.

Or maybe you left the phantom power on ???




........ Phil




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