Tube life

Tubes Asylum

Questions about tubes and gear that glows. FAQ

I am relatively new to tubes, having had a CJ tube preamp for about a year and loving it. My question pertains to life expectancy and test numbers for tubes like 6922s and 7308s which are rated for 10,000 hours. If used old stock tubes are purchased that in fact test new, should they be expected to last anywhere near 10,000 hours? Is the decline in performance linear and only noticable when they approach the minimum good test numbers? After about 5,000 hours of use, will the test numbers reflect that they are half gone, or will the numbers and performance hover near new until the last 1,000 hrs or so and then decline rapidly? Thanks.

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Topic - Tube life - MnMark 17:32:05 04/08/07 (4)

Re: Tube life - Larry I 15:07:40 04/09/07 (0)

Re: Tube life - Ron Oehlert 12:14:52 04/09/07 (0)

Not really a fair comparison, but - Tom 11:10:55 04/09/07 (0)

Re: Tube life - Chris O 18:54:27 04/08/07 (0)

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