Tubes Asylum

Questions about tubes and gear that glows. FAQ

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Sockets are absolutely not interchangeable!

Posted by andy evans on October 9, 2021 at 09:45:27:
In Europe in the 1930s they used side contact, Y8A, B4, B5 and B7 bases, even some rare Mazda bases. So no way of just rolling those old tubes in octal or 9 pin sockets. Like I said, Head-Fi members went through a vogue of using adapters for EL12 and EL11 tubes.
I doubt that many European tubes like the above ever crossed the Atlantic, hence they remain under the radar and never come up in forums.