01-12-2015, 05:27 PM
(01-12-2015, 04:30 PM)Joe Rossi Wrote: I don't think a 43 would fit into the socket marked 43 either. Hmmm...
I think the following information from Radio Museum.org answers these questions.
"In 1935 Triad introduced a line of metal vacuum tubes with octal base in answer to the GE-RCA metal line. The early release of Triad line, with MG suffixes, included 13 types, all characterized by glass bulb inside a metal envelope."
The metal tubes in this set are Triad MG Series so they would have an octal base.