I'm writing up eBay auction material for
a pair of 6508 M-V rectifiers. I could
use a tube base diagram for them, as
well as some commercial or industrial
applications for these beasts. They are
rated 21,000 PIV @ 2.5 A which could
power a good-sized broadcast transmitter
in the 1940's or '50's. Any help would
be appreciated.

afcsman W9NPI