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My preamp didn't work so I figured it was the tube. How do you see if it's broken?

I ordered a Bugera T50 Infinium from Musician's Friend. I was stoked to receive my amp however, when I opened the box which was BRAND NEW from BUGERA the amp was busted to all hell. Different knobs where busted off at the base of the pot. The literally powerswitches were busted of causing me to not even be able to turn the amp on. I have to say I am extremely disappointed, frustrated and beyond pissed that Bugera's QC would tank it with an amp this badly. I waited 2 months to get this amp from a backorder and to top it off it was a birthday present. My first interaction with Bugera is not off to a great start.

I bought the foot switch specified on the back of the amp and the connector is different.

The amp has a big connector and the foot switch has a small connector.

The part number is the exact part number called for. 

So is there a replacement connector that I can wire in ? Or and adapter ?

Hello, I have a bugera infinium 333xl 212, I bought it at the end of February, and since June I have the following problem, it tells me that valve # 3 fails. I contacted the seller, they did technical service, they replaced valve No. 3 They replaced all of them, but the problem continues. The moment they returned it to me, I tried it and it worked well for 3 or 4 hours, I turned it off, the next day I tried it and led # 3 came on again ... At one point, led # 4 came on, inclusive, and even standby blinked, the amp completely shut down and didn't turn back on, they fixed it, it worked again, and the same problem again after a few hours. I'm starting to get disappointed because I can't enjoy the amp. Did the same thing happen to someone?