Is there a Standard Pinout for Tube Mic Power Supplies?

[Ethan]

Is there a standard pinout for the 7-pin XLR on tube mic supplies?

I know the power pins sometimes differ for different mics, but how about the Hot and Cold pins carrying audio? Are these always Pin 3 hot and 4 cold?

Thanks

 

[Ethan]

OK, I just took a few apart and the answer seems to be no.