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In Reply to: RE: looking for 6N1P-ev posted by jhrlrd on January 17, 2015 at 10:53:40
Buy a bunch from Russia. For whatever reason, 6N1P's seem to kind of go flat after 6-12 months of use.
Follow Ups:
The 6N1P in my preamp has been going strong for almost 10 years (with a 12AX7 as a cathode follower). Of course, the amount of "on" and/or listening time, as well as the usual factors (supply voltage, etc.) will determine that too...
I've averaged 1 to 1.5 hours/day of use on mine- even at 1.5 hours/day over a 10 year period, that is just under 5500 hours since the preamp was built...
I'm not trying to call you out or anything. I'm just curious that you only get 6 to 12 months out of one. What are you running it in?
Dman
Analog Junkie
Try buying 8-10 of them and find two pairs that sound about the same. Run one pair for a year, then listen to the original unused pair. It's an odd thing, they will end up sounding very different. (Despite being electrically OK)
I find that, out of the box, they sound edgy and fatiguing and it takes a long time to break them in so that they sound clean. I haven't heard any flattening, later on. The initial sound is really hard on my ears and maybe that's my reference!
Maybe this has something to do with different preferences for different folks.
Observe, before you think. Think before you open your yap. Act on the basis of experience.
About five or 6 years ago, my preamp did indeed start sounding rather, "off". Something wasn't right.
So I did some tube swaps- old for new. As I did this, I tested every tube to verify what might or might not be (were my ears starting to lose it, for example?).
Turned out one the 12AX7s in the phono stage wasn't quite up to the task anymore. Once it was replaced, things were golden again. The 6N1P that had been in place in my preamp since new (pre AND tube) didn't sound any different than a new spare that I tried in its place while diagnosing things (and the test measurements weren't all that different either!).
While I don't doubt you had a seriously different outcome, I can't come up with an explanation for your findings vs. mine.
Weird...
Dman
Analog Junkie
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