This is a new tube for no reason. The amp used to work and only needed a speaker and a fuse. A couple years later my friend had spent 350 with a worthless hack of a person who I constantly clean up after and I am not even a professional repair dood they just think so? I am jist a simple guy making Marshalls kick ass.
Instead of replacing the slidey power switch he drilled it for a paddle as big as the amp. Nice use of garbage for a premium there, hack.
He has the original tube in a drawer miles away from here. 
 
This tube cost him like over a hundred bucks and it's a NEW TUBE W/ BROKEN KEY.
I see you, Gordon Perry. Stop breaking good people's crap and charging for recaps you don't do properly and underbiasing because I imagine you just guess at it? You are a good player. Go play. (Leave your brother at home. He can't)
Signatures have a 255 character limit that I could abuse, but I am not Cecil B. DeMille.