Why does Fender label diodes in reverse?

[Enzo]

Not sure what you mean. They do have a plus/minus sign by the diodes, but the symbol is clear that the anode is the source of negative DC. And the B+ diodes are also correct.

[olddawg]

Just be careful handling and disposing of that selenium rectifier. They are pretty toxic.

[g1]

Not sure what you mean. They do have a plus/minus sign by the diodes, but the symbol is clear that the anode is the source of negative DC. And the B+ diodes are also correct.

Yes, that is what I meant, + and - on their schematics are showing voltage polarity, NOT where the anode or cathode are. And they did it for selenium and silicon alike.
Some gut shots of the unit in question would sure help things along.

[jbrew73]

maybe i am the one confused but the harvard and twin both look drawn correct to me.

edit. never mind i see what you are saying now. guess ive seen so many fender layouts that i didnt catch what you were refering to.

[Randall]

They are drawn correct on the schematics. The layout on the Harvard 5F10 is my original issue. The + sign on the layout vs. the + sign on the selenium in this '58, which I believe is original, do not jive. Wire it that way, and get about +7v. Anyway, the amp is returned, it sounds great, and I may never know what was the original thinking here. Never thought that referring to a 55 year old Fender layout would be such a PITA, but C'est la vie.