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Old 07-21-2019, 12:23 PM   #4
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Join Date: Jun 2019
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Originally Posted by Fritz View Post
I'm planning to use the attached diagram to put t-power in a channel of an XLR patchbay using a 12v battery pack for an old Microtech Gefell PM860 mic. MY question is to make sure I'm not going to mess up a modern preamp running 12v across pins 2 and 3 with nothing to ground.


You need to make sure that there is(are) input capacitors on the feed to the pre amp, most pre amps will have these but check because if not , and the input is transformer balanced, you will probably blow the T power supply.
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