Eric wrote:=0D
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"Drawing more or less current from the phantom supply might result in a ch=
ange in the amount of noise in the phantom supply, but it should still be t=
he same in each leg."=0D
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Agreed.=0D
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"So the only means that I can see by which microphone imbalance could caus=
e an increase in observed noise is if there is an imbalance in the AC compo=
nent of the differential output impedance of the microphone."=0D
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Yes, an imbalance in the AC component of the differential output impedance=
of the microphone would of course also degrade the immunity of the recordi=
ng system against external noise sources. =0D
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I believe however that the problem we are talking about is simply caused b=
y a poorly designed (or badly manufactured) microphone that just does not d=
raw equal currents from the pins 2 and 3. Proper balancing would normally r=
equire series resistors with tolerances less than 0.4% - not only on the t=
wo 6k8 resistors inside the recorder, but also on the resistors (or equival=
ent transistor-based loads) inside the microphone!=0D
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Regards,=0D
Raimund=0D
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