Quote Originally Posted by WZ7U View Post
What does a Tung Sol ts227 go in? Audio or rf application?

Not having any luck with a search engine finding that particular tube.
It's a type 27. Many manufacturers made them under license from possibly Westinghouse. I think from what I've read this would be used as an audio preamp. Was introduced in the 1920s.

http://vinylsavor.blogspot.com/2015/...-month-27.html