10-21-2011, 11:51 PM
If it's a true cathedral set that places the tubes in the era before 6.5 volt tubes, usually 2.5 volt tubes like #24s and #27s or #56s and #58s. As far as I know they didn't normally make series string sets unless they were for a DC power line (not AC or DC). What is the tube lineup for this set, the only RCA model 100s I could find is an RCA Radiola 100.
Regards
Arran
Regards
Arran