6922 tube selection

I would highly recommend using Jim McShane for your tube purchases. One of the best

Very good comments and feed back. Thank you. NOS is just that; NOS. No one 'really' knows where they have been or how and if they have been used. No one knows how many times they were bought and sold through middlemen and liquidators. I agree that any new tube can sit on a shelf for 100 years with no issue, but apply the voltage and the clock is ticking. NOS has been out of production for so long (~50 years) one would hope that those still making tubes have developed some manufacturing advancements to insure better quality control. Once again... Thanks!

Quincy,

If your comfort level requires that you use only new production tubes then that's what I think you should do. There's no sense in destroying your enjoyment of music with worry about what's in the equipment (and don't think I'm being sarcastic because I'm not!). I would ask you though, in these days of planned obsolescence, has improved quality control trumped the quest for the almighty dollar (or ruble as the case may be)? I believe that NOS tubes are, in general, better made than current production because people used to take pride in what they made. In addition, the tube sellers previously mentioned scrupulously test the NOS tubes they sell. I think I would worry more about putting an untested new-production tube in my amp than a NOS tube that HAS been tested but that's just me. In any case, you have a great preamp. Re-tube it and enjoy.

Dick

I got a pair of 6922 Telefunkens from Kevin @ upscale, and they were well worth the high price.

04-04-15: Quincy
Very good comments and feed back. Thank you. NOS is just that; NOS. No one 'really' knows where they have been or how and if they have been used. No one knows how many times they were bought and sold through middlemen and liquidators. I agree that any new tube can sit on a shelf for 100 years with no issue, but apply the voltage and the clock is ticking. NOS has been out of production for so long (~50 years) one would hope that those still making tubes have developed some manufacturing advancements to insure better quality control. Once again... Thanks!

That's precisely why I only purchase NOS from reputable dealers.

In order for advancement, you need demand that triggers investment. I think demand for tubes are probably higher ~50 years ago so I doubt any recent break through.

Also some raw materials use to make NOS are ban so new tube quality suffers in terms of SQ and durability.

I've been rolling tubes forever and haven't found many or any new small signal tubes beat a NOS. Now power tubes are a different story.