Hello everyone, this is my first post, and it might be a real head scratcher. I recently purchased my first broken tube amp with the intent of fixing it, and now I've reached the point where the knowledge I seek is not readily available online. I see many experts on here and would love some help. What I know (or don't): The amp is original except it's had the filter caps done. The large older caps were left sticking up off the top of the chassis for looks. Below you can see what the original caps were on the schematic. After the cap job the amp supposedly ran for a few hours then started blowing fuses. Then it sat for a few years until I bought it. I took all the tubes out, turned it on and it's still blowing the 250v 2a slo-blo. One funny thing I noticed is that one of the large old caps above the chassis was actually not to spec. The cap in the manual known as C2 was supposed to be 20uF, 450v, but rather, you can see it's actually 16uF 500v. But none of this should matter since the filter caps were replaced, right? Well, I wonder if any damage could have been done previously to the amp because of this part. The power transformer looks like it's gotten real hot at some point in the past and has some tar on its surface. Another alarming thing is that the diode of the old Sprague (C2) Cap is being used to connect all sorts of wires together still (also pictured). As far as I can tell, it's still fully connected to the circuit and running in parallel to it's replacement. Is that okay? Speaking of its replacement, I noticed that the new, smaller caps also have a different capacitance than the schematic calls for. C1 and C2 are supposed to be 20uF, 450v capacitors, but the ones installed under the chassis (pictured below) are in fact 22uF 450v. Does this matter? Next, I noticed that on the schematic, pin 8 of the 5U4GB rectifier tube is supposed to be connected to the 20uF(C1) cap, then on to ground. Instead, the 8th pin is not at all connected to C1, rather the 8th pin is connected the first pin by a very short wire, then pin 1 is connected to a (newly installed) 47uF 500v capacitor(???), before it's connected to a 22uF(c2) cap (like it's supposed to) and so forth on its journey. My question is, what is this 47uF capacitor doing here? The schematic does not (as far as I can tell) call for one of these anywhere in the amp. I realize that I may just be grossly misunderstanding something, but that's why I'm here. I will be very grateful for any help. Cheers.