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Questions about tubes and gear that glows. FAQ

We fail the tubes on three very common parameters

Two of them are universal - noise and microphonics. The third one is also the standard tube parameter, that some circuits might not be sensitive too, but it is not our invention - it is there, on their spec sheet.

Like I said, we do reject high number of current production tubes. With the NOS's there is no such thing - you just plug them in and you can ship the product. We went through many thousands of them with virtually no rejections.

I truly have no skin in this game, as the NOS tubes are pretty much all gone now, but it is not correct to say the two populations are equal.

The discussion is almost academic at this point, but my recommendation is - if you see some NOS's pop up - get them.


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