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Single Ended Triodes (SETs), the ultimate tube lovers dream.

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RE: EML 2a3 mesh and JJ 2a3-40

Posted by tube wrangler on July 11, 2012 at 07:08:06:
I'm not sure about the JJ 2A3-40 pricing right now, but these were about $115 USD each last time I looked.
Since your amp is PP, the requirement for ultimate transparency is greatly lessened over a simple S.E. application, but you'll still need repeatability in tube characteristics to run 4 of them at once..
The Electro-Harmonix versions of the Sovteks are way better than the plain Sovteks. In S.E. service, both are unremarkable and have stunted Bottom-End. However, in Push-Pull, you're going to get Bottom-End if the amp's design allows it-- tubes are a lesser factor.
4 output tubes is a lot of complexity to run simply to listen to music, however-- but people do it everyday.
If this is working for you, perhaps the rugged reliability of the JJ-- once you find 4 that are similar to each other (that's a tall order for any output tubes) would fill your needs for a long time. They seem to be completely "Bulletproof" in our S.E. amps.
I have a friend who is running 4 of them in a Mastersound integrated stereo amp-- has been for years-- upgraded the JJ power tubes last year--they're still running OK.
The last of the JJ's I purchased cost me $105 USD each.
The Electro-Harmonix and Sovteks that I have around here were cheaper-- the Sovteks a lot so. I have quite a few-- and no use for either.
I also sold-off all NOS as soon as I knew that they're not doing the job right either-- all kinds! I probably kept a few of the best NOS-- Spring-Top Sylvania, etc. If you can use any of this, let me know.
I don't sell JJ or EML. I buy those for my amps.
---Dennis---