YMI5150?

is this normal? I'd say the volume triples for a moment if I shut down while a note is still ringing. Is this a symptom of the power tubes going? it's a fairly new symptom.

I've been running preamp volume around 4, gain at 4, and master at 7ish and it's not overwhelmingly loud; especially compared to 100watt heads I've played in stores. could be normal for a 60w head. I've replaced all 4 preamp tubes with Marty's NOS tubes but have no idea how old the power tubes are.

BTW, it's driving a 1960ax.

Marshall Amps

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MartyStrat54

Sounds like you might be getting a current surge from the power transformer when the magnetic field is collapsing. Even though you have turned the amp off, the power filter caps have a lot of energy and since you are trying to drive a signal, the amp is trying to work. It's best to turn the amp on standby and then after a few minutes shut it off completely. I'm not saying it will damage the amp, but you are basically playing the amp in a momentary brownout. This is the effect that is obtained using a variac. Eddie Van Halen burned up a lot of Marshalls playing his famous "brown sound." It's especially hard on the heater elements inside of the tubes.

Marty

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MARTY

2009 Gibson Explorer-Hell Raising Machine
1989 Fender Strat Plus USA
2008 Fender Tele USA
2004 Schecter Elite w/DiMarzio's

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