Chris Breitner wrote:

Hey Everyone. I can't seem to find the answer and/or product to
satisfy my needs: a phantom power filter/remover.

I have a ribbon mic I'd like to gig with, and the PA systems we use
normally plug into have an all-channels-on/off for the phantom power.
Our vocalist uses a condenser mic, so she needs it on. If the phantom
power hits my ribbon mic, it might permanently damage the ribbon
element.

Does anyone know of a DIY homebrew solution?

Someone will, I hope, correct me if I'm wrong, but couldn't you just
lift the ground and go with a floating ground? The potential is between
pin 1 (the ground) and pin 2 and between pin 1 (the ground) and pin 3.
There is no potential between pins 2 and 3 because there are equal
value resistors between them and the +48V of the phantom power.

I'm assuming, of course, that cutting the ground near the mic will
still provide you with adequate noise shielding, etc.

- Logan