mordy
Headphoneus Supremus
- Joined
- Aug 8, 2010
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Right now I am using a pair of metal 6J5 tubes, both are labeled Tung Sol and from January 1944. One has the RCA rim markings and the other one not. They sound a little different with the Tung Sol tube having more bass.I don't believe that Tung-Sol ever made all-metal tubes. Given that they were more expensive to manufacture and required specialized factory equipment, many manufacturers, especially the the smaller ones like Tung-Sol, passed. Although, some companies simply mounted a glass octal inside a metal shell.
So I'm inclined to believe that Mordy's Tung-Sol is a relabeled RCA.
IMHO it seems plausible that Tung Sol made metal tubes since such tubes were in production from 1935 until at least the end of the 40's.