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Old blackface Fender Champ. This amp is basically all original and still works good. A 3-prong was added somewhere along the way and the

Old blackface Fender Champ. This amp is basically all original and still works good. 
Caps date this amp to 1964.

Just a handful of parts and that' really all you need. Amp was blowing the mains fuse because of an intermittently shorting power tube. Look, there is a little mis-step. A 3-prong cord has been added and the green wire is grounded to the chassis, which is good. With 3 prong installed the capacitor that goes from fuse to ground should be removed. This one has been clipped on the wrong lead. It has been lifted from ground but it is still attached on the fuse side. The little length of wire going from the fuse to the capacitor has 120V AC on it. If it makes contact with the chassis it will blow the fuse. They should have clipped that side and left the grounded side connected to the chassis. Schema and other info are available here -- http://vintagefenderamprepair.com/schematics/blackface-schematics/

Just a handful of parts and that’s really all you need. 
Look, there is a little mis-step. A 3-prong cord has been added and the green wire is grounded to the chassis, which is good. With 3 prong installed the capacitor that goes from fuse to ground should be removed. This one has been clipped on the wrong lead. It has been lifted from ground but it is still attached on the fuse side. The little length of wire going from the fuse to the capacitor has 120V AC on it. If it makes contact with the chassis the mains voltage will short to the grounded chassis and it will blow the fuse. They should have clipped the fuse side and left the grounded side connected to the chassis.
Schema and other info are available here — http://vintagefenderamprepair.com/schematics/blackface-schematics/