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Given the thread below on the questionable reliability of JJ tubes, in your opinion does this lack of QC also apply to the 2A3-40? The general consensus seems to be that these problems exist with the octals, not the power tubes. I'm currently running the stock Sovteks that came with my Ultra-Fi monos and they sound good, but are perhaps a little lacking on "punch" and "air". If the QC issue doesn't seem to apply to the 2A3-40s, for those that do run them, where do you prefer to buy them? Jim doesn't appear to carry them, and of course there could be a good reason for that (as he's already stated) but without mentioning this particular tube.
If not the 2A3-40, then what? Jim does carry the EH 2A3 Gold, which could also be an option, with the advantage of knowing they've been properly checked before shipment.
They are nice sounding tubes - they do dynamics like no other 2A3 I've heard. Not my faves, but I could live with 'em.
The pins on mine seem a little large (dia) and rough, but otherwise okay.
EuroTubes are supposed to be a reliable supplier. I think I got mine from Tube Depot.
"Confusion of goals and perfection of means seems to characterise our age." Albert Einstein
Several years ago, people had problems with a bad batch of JJ-2A3-40. But it seems the problem has resolved? I don't know. But I don't have any problem with any of the 6 JJ 2A3-40 I have.
I like the JJ better than EH but really, the JJ 2A3 are 300B with 2.5V filaments. And 300B and 2A3 are not that much different in Operating Points. I like the RCA 2A3 which are better sounding tubes than the Chinese or JJ.
.Thou shall not stand where I type for I carry a bottle of Certified Audiophile Air and a Pure Silver Whip.
The JJs are nearly twice the cost of the EH, so I'd expect them to be an improvement. Dual plate RCAs aren't much more than the 2A3-40s though, so that may be an option worth exploring. Thanks!
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