🚀 go-pugleaf

In article <CAFD5v.8t3@xstor.com> Tom Pellicer, tompelli@xstor.com writes:
>My problem is occasionally the mike level will just drop out for
>a few seconds and then come right back up - almost like someone >pulled
the vocal fader down and up real quick.  I tried a number of >different
channels on my board and it seems to happen on all of >them.  I made sure
that the U87 was switched to the external >power, as well.  I also tried
both jacks on the AKG power unit.

Sounds like a capacitor problem to me.  Either the power unit or the
microphone itself may have a capacitor that has a poor ground, or is
intermittently failing.  I would get my trusty multi-meter and start
measuring the linear elements.  But if you are not comfortable with doing
that (especially since it is not your equipment) you might consider
paying for the bench time and parts at the shop.

Just a few thoughts...

dan