Hey, I bought my first tube amp a while back and now I think it needs new tubes, it is making a wierd noise like someone blowin into a mic. any way, I just wanted to make sure that was the problem and also ask i you guys have any suggestions on where I can get some nice 6L6 tubes. I play heavy mostly so does that makes a difference in the tube I should buy? thanks for any help u can give me.

I have a Peavey Valve King btw. 112.