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Questions about tubes and gear that glows.

Here's a question.

Years ago I acquired a NOS pair of Tektronix Matched Telefunken 12AU7's with the Tektronix labels on them and the original Tektronix double box. They had no discernible diamond on the bottom and due to the labels on the tubes the date codes were not visible. I'm not sure whether they were genuine Telefunken tubes, but they did sound very nice. I no longer have them and never did a real comparison to another pair of well used diamond bottom Telefunkens I had at the time. Just curious about them.


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  • Here's a question. - R Browne 19:02:02 07/12/12 (0)

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