powering rectifier w/6v tap

[drewl]

There are several amps that use the 6v filament winding to power a tube rectifier, what happens if you try to power a 5AR4 or 5Y3 with a 6v winding?
Why did Fender and others use a seperate 5v winding for the rectifier filament?

Just thinking aloud for an experiment/project I was building, Thanks.

[52 Bill]

There are several amps that use the 6v filament winding to power a tube rectifier, what happens if you try to power a 5AR4 or 5Y3 with a 6v winding?
Why did Fender and others use a seperate 5v winding for the rectifier filament?

Just thinking aloud for an experiment/project I was building, Thanks.

Because the output of those rectifier tubes is connected to the 5 volt filament. If you try and hook up the 6 volt filament line to the B+ you'll blow up the amp, transformer, tubes, etc.

[drewl]

DOH!
I should draw these out before posting.
So was it those type or rectifiers were developed first instead of using something like an EZ81 which uses the same filament tap as the other tubes, and has a seperate anode, or output?