When I fire up my DSL-40C, for about 2-3 minutes it sounds awesome, but then it makes a pop and the volume goes significantly down where I have to reach over and adjust it back up.
I'm thinking a tube is going out, It has the original Marshall tubes. I tried tapping them to see if any were microphonic, and I didn't see any of them doing this. I'm wondering if I should check the bias voltage, do a tube walk, or just change them all out. I have no idea how old the tubes are and how much they have been used, I bought the amp used and had it for about 2 years. It doesn't get played loud, it's my home practice amp.
If I do a tube walk and find a bad tube, I'm gonna change them all anyway. But it would suck to change the tubes and have it still pop. I don't have another tube amp at the moment to swap tubes.
Thoughts?
I'm thinking a tube is going out, It has the original Marshall tubes. I tried tapping them to see if any were microphonic, and I didn't see any of them doing this. I'm wondering if I should check the bias voltage, do a tube walk, or just change them all out. I have no idea how old the tubes are and how much they have been used, I bought the amp used and had it for about 2 years. It doesn't get played loud, it's my home practice amp.
If I do a tube walk and find a bad tube, I'm gonna change them all anyway. But it would suck to change the tubes and have it still pop. I don't have another tube amp at the moment to swap tubes.
Thoughts?
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