#1
It sounded okay when I got it out of the box earlier today, but I'm noticing my AC15 was starting to have this kind of slight volume fluctuation when I let a chord ring out. Could one of the tubes be going out or did one just come loose during delivery? I can't check right now because I just turned it off and the tubes are still, "warm".
Fender Telecaster
DeArmond M series
Vox Night Train 15 head w/Weber loaded 1x12
Dunlop DVP3 Volume (X)
Klone circuit/Russian Big Muff 2in 1
Fulltone Fulldrive 2 MOSFET
TC Electronic Nova Delay
TC Electronic Nova Repeater
Line 6 M5
#2
A tube might be dying or it may have been broken on arrival. I don't know what do do in that situation though
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#3
A tube might be loose. Apparently that's quite common when the amp's in transit. Try taking the tubes out and putting them back in.
#4
Make sure the tubes are seated (you don't need to remove them just gently work them side to sidea tiny bit and you'll feel if they're loose.) If its not that then I'd contact the seller. You bought this amp new? If so I'd send it back.
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#5
Volume drops are usually powertube related. As others here have stated, just reseat all your tube just to eliminate that potential problem. If it's a new amp, I doubt it's dirty contacts in tube sockets. What tubes are you running?
Gear:
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Marshall DSL15H, Weber Speakers, Fender Champs (x2),
'63 Fender Reverb, Mosrite Fuzzrite, Joe Bonamassa Fuzz Face, Whiteface RAT
Vintage Tubes!
#6
onboard tremelo turned on?



But seriously, volume issues sounds like an iffy power tube.
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#7
Okay, I'm about to check it out since I haven't played it in a while and everything has cooled off.
Fender Telecaster
DeArmond M series
Vox Night Train 15 head w/Weber loaded 1x12
Dunlop DVP3 Volume (X)
Klone circuit/Russian Big Muff 2in 1
Fulltone Fulldrive 2 MOSFET
TC Electronic Nova Delay
TC Electronic Nova Repeater
Line 6 M5