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I've got a mig 60 since 1 1/2 year back. Had to replace power tubes after the first summer (lots of gigs) after that it has worked fine until now.
The problem i have is that after a while of playing through the high input i get a scratchy and fizzy sound that can't be dialed out by the tone controls.
The sound gets buzzier and weaker.
The signal from the HIGH input goes through a 12ax7 into the LOW.
It's hard for me to hear if the noise is coming from the first gain stage or if its later in the signal path.
Sometimes when i mute the strings and hit them hard i get like a crackling+whistling noise.
I've tried to replace all the preamp tubes and the problem didn't go away.
I want to believe that the power section is fine. It's still plenty loud and i can get the sound more "ballsy" if turn the MV up.
The noise is there where ever i set the MV at.
I can't find any signs of something broken inside (like burnt components or loose wires)
here's a schematic: http://www.schematicheaven.com/newamps/sovtek_mig60.pdf
Any suggestions?
The problem i have is that after a while of playing through the high input i get a scratchy and fizzy sound that can't be dialed out by the tone controls.
The sound gets buzzier and weaker.
The signal from the HIGH input goes through a 12ax7 into the LOW.
It's hard for me to hear if the noise is coming from the first gain stage or if its later in the signal path.
Sometimes when i mute the strings and hit them hard i get like a crackling+whistling noise.
I've tried to replace all the preamp tubes and the problem didn't go away.
I want to believe that the power section is fine. It's still plenty loud and i can get the sound more "ballsy" if turn the MV up.
The noise is there where ever i set the MV at.
I can't find any signs of something broken inside (like burnt components or loose wires)
here's a schematic: http://www.schematicheaven.com/newamps/sovtek_mig60.pdf
Any suggestions?
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