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EmilThough it may cost you a couple of dollars more I would call Andy at Vintage Tube Services and talk to him about what sound you are trying to achieve. His tubes are thoroughly tested.http://vintagetubeservices.com/
Why do you buy the 12V version amp?It has fewer manufacturers options, it just have stronger emission than the 6V, In this scenario I would be glad with RCA 12SN7GT..
"More robust" is one way of putting it! 1.5A per tube instead of 600 mA (at 6.3V).
Very true. From a pure sound-quality standpoint, the 6BL7 is a very special tube, one of the few "sleeper" tubes out there that people haven't discovered yet. But you are right, it's absolutely not a drop in replacement for a 6sn7.
Thanks for the image bro, I meant what 1625 tubes you have been using in this amp and your sound impressions? any time life info?
Looking to add a bit of "warmth" to my system and RCA was one recommendation that I was given.....
If these are for your MicroZOTL, don't neglect the 12au7 input/driver tubes. Discuss with Andy as well. These have a significant impact on performance.
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