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In Reply to: Can't agree posted by RFGumby on March 11, 2007 at 17:16:58:
Granted, I do turn things off, but mine have been playing away for at least 10 years and were used to begin with -- found them in an estate sale Tandberg tape deck.(Why do I get the feeling I'm gonna regret this post?)
Follow Ups:
Teles are the tubes for longevity. I pulled an early-60's Tektronix 531 scope apart, with loads of 6dj8s, 12aus, and 12axs. All the original 12au's (other than a pair of Teles) had been replaced with orange-globe Amperexes, and were all past their best. The two Teles were obviously originals, and still pegged the top of the meter.
Dave if the average life of the Telefunken ECC83/12AX7 is 10,000 hours it is very possible they could last 10 years.Just an example:
Say on average Mon thru Fri you listen to your system a couple of hrs a day. On weekends a total of 10 hrs. That would be on average of 1,040 hrs a year.
Your premise is logical, but a little off in my case. Especially since I retired (in 2000), the system has been on for a LOT more than a couple of hours a day :-)
Dave,I do get worn out ones from time to time. But I will say they are amazingly durable! Way more so than any other I've seen.
Just bear in mind that long after Telefunken stopped producing these tubes they kept ordering them in Yugoslavia. These tube have perfect Telefunken marking but in fact they are the same Ei tubes.
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