Im having a problem with both of my J99s and phantom power. When I use a condenser mic powered by the preamp, Im getting a fuzzy noise:
http://goose-tracks.com/thegeekgoose/clips/test.mp3
Its not very audible but it is there. None of my dynamic mics nor my self powered tube Condensers do this when put through this preamp, but every condenser the preamp powers has these artifacts in it. Some worse than others. I measured 46v at the mic cable when the phantom is turned on. None of the other modules in the rack have this problem.. just the J99s. Ive not unracked them yet to have a look but any suggestions would be helpful as Im not even certain where to start looking.
Thanks
Jeff