The 3B22 is the full wave version of the 866A class of rectifiers.
3B22 is very disappointing compared to mercury, thin and bright.
Attached a datasheet for the NL-606.
I checked there but must have overlooked it. Thanks!
Also I just opened mine. It's the "L" lug version but that's okay.
It makes my 866AX's look very puny.
Now to get to work on the filament xformer.......
As I said in #14 😀😀😀!3B22 is very disappointing compared to mercury, thin and bright.
Best regards!