I've had my Fenders Blues Junior with billm mods for a while now. Recently, it has been making crackling and popping sounds whenever I play certain things. Earlier tonight, when I turned it on (with NO cables plugged in!), all i got was a buzzing sound which I could control with the master knob. I turned it off and turned it back on later and the buzzing came back after playing for less than a minute. This time I couldn't control the loudness with anything.

I know the problem isn't my crappy cables because it sometimes makes the noise even with nothing plugged in. Can anyone tell me what I should do?
Hmm..over a year ago. Is this what happens when tubes go bad? My first guess was a loose connection somewhere.
Yeah, thats what happens when your tubes start to die.

and congrats on the amp. My buddy's got one with the billm mods and it sounds great!
American Strat:
Area 61 Neck, Area 67 Middle & Bridge
Spretzel Locking Tuners
Graphtech Nut & String Tree
Lots O' Love!

JSX + Orange Cab
Fender Blues Deluxe
Deluxe Memory Man
Fulltone Full Drive 2 & OCD
H2O Chorus/Echo
Yeah I love this amp. Always worked fine until now. Should I be looking to replace the bigger tubes or the smaller ones? or all of them? Any suggestions on brands?
Thanks for the quick replies btw.