How to identify jack polarity

How to identify jack polarity

How to tell polarity expected of a DC barrel jack?

How to determine the polarity

How to identify polarity
 
Voltage Power Supply
 
Reversible Polarity
 
Power supply input 

DC Power supply Jack connector pinout

Power supply jack

 

Frans' Phantom Power Supply schematic

Shure 840 Pad Modification and Measurements

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