TFridgen
Well-known member
What is the typical cause of howling/moaning/whistling/whooshing coming from my Mesa 295. Power tubes look fine. It happens on both channels. I had been playing all day yesterday, turned the two channels onto standby and when I came back an hour later, it was making these noises. To reiterate, it happens to both channels when flipping them off standby. Sound like the 12ax7's? Any help is appreciated. :rock: