First Problem with the AFD

[Slash1337]

So yesterday I was playing along to so shit, and the volume of my amp drastically dropped. Then about 10 seconds it went back to normal. I didn't really notice it at first as I usually jam out pretty loud and the music and my amp are usually at same volume. I thought maybe it was my cables which have been used and abused. So today I switched out the cables and it's doing it again. There is no pop sound or whatever. It's almost like a ghost is switching the attenuater from 1 wattage to the next and then back up again. But it's random. So I thought maybe it was my new Gibson, maybe a Pickup problem, so I plugged my Epi in and same thing. Like I said, no hums, no buzz, no pops. Just gets really quiet and than goes back to the regular volume it's supposed to be at.

Starting to think it's a tube issue and haven't turned the amp on since. So what do you guys think? Power tubes, or pre-amp tubes? Or something else?

[Soulcaster]

If it is doing it when the EPA is all the way down it could be an input power issue. Re-bias.

If it is doing it at normal playing volume I suspect you may have a tube on the way out. Re-bias, if this doesn't work check your indicator lights to see if any of them are illuminated. My money is on a tube though mate.

Let us know what happens pls....

[slash-ed]

Is the EPA on an "in between" position? This can cause the sound to fluctuate a bit as the knob isn't "sure" what setting it's on.

[Slash1337]

I'm gonna try and move the knob a little more and see what happens. Although I haven't really moved the settings on the amp in ages. I'll check the back as well.

[AXE]

I hope your EPA isn't taking a crap on you.

One of mine did.

[Slash1337]

So, I moved the power know a little more and no more problems. That's pretty weird that it does that, definetly be keeping that in mind for when I play live with it.

[surfnorthwest]

You should see it you can replicate that, should tell you if it is something you need to be cognizant of or it was just an anomaly.

[Slash1337]

So far so good. I think I'm gonna find out where the right spots are where it wont do have volume drops etc with like some tape or something. I checked the tube lights in the back and none were lit so I think the tubes are okay. I think marking the spots would be my best bet. Volume drops live would be a problem :P