Originally Posted by Pasta4lnch
although changing the tube would be the obvious first step, and most likely the problem - I had a similar issue w/ a mic once and it turned out to be a loose connection to the capsule . . .
I just got off the phone with the local rode service center and they first thought it could be the capsule.. But since it sometimes can be on for hours without any problems - they said it could also be the power supply..
God damn its expensive to change the capsule for the rode.. Over 400 USD to have it replaced..
But they are not sure ofcourse. Gotta see it first.