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Questions about tubes and gear that glows. FAQ

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RE: The most expensive 12AX7s - TFK, Mullard, GEC.....

Posted by Jim McShane on July 2, 2024 at 14:08:31:
They are scarce! Hard to find tubes routinely cost significantly more than tubes that are more easily obtained - regardless of their "quality".

The law of supply and demand applies here. And if the supply is VERY small it takes just a tiny demand to push the price up.