Peavey Butcher, no heater voltage!

[Enzo]

Different voltage at the two ends of a fuse is a darn good sign it is open.

Always pull a fuse from its clip and check it with a ohm meter.

[Dave H]

Well, you had it already in your first post. A good fuse will not have voltage across it.

I nearly said something when I first read that but thought it too obvious. Surely he couldn't be measuring across the fuse? He must be measuring from fuse output to the other side of the winding.