Anyone know how to test a BH rectifier tube?

[N2IDU]

Greetings from Old Shincracker, Vt.

I have an old model "B" battery eliminator power supply manufactured by Atwater Kent that uses a BH tube. I can find no reference in my tube tester or substitution books  to test it. Does anybody out there know how I might do this? I want to use it to power up my Atwater Kent breadboard Model 10C.

Thanks,
Peter N2IDU

[Pete, WA2CWA]

This should provide some insight:
http://www.clarisonus.com/Archives/TubeTheory/New_Rectifier.pdf:
And this:
http://www.antiqueradios.com/forums/viewtopic.php?t=32110&view=next&sid=e696bb662e795dce955eb693568eb434

[N2IDU]

Thanks Peter for the helpful info.
N2IDU Old Shincracker, Vt.