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PSVANE 12Au7 12At7 12Ax7 "-T MKII" 2020 production run of small signal/driver tubes

Re-testing year 2020 production run of these tubes. Would like to hear from others who’ve re-tried recent production?

>>PSVANE 12Au7 12At7 12Ax7 "-T MKII" small signal/driver tubes made in year 2020"

Background:
After following stories about TJ Full Music’s founder passing, and the son reselling tooling of all of the small signal tubes to PSVANE, and recent luck over the past year with TJ 6SN7 tubes for my preamp, I thought I’d give the new PSVANE small tubes a retry. Checking to see if any designs or manufacturing goodness made it over to PSVANE yet from TJ. Also, took advantage of an opportunity to buy these direct from a major overseas distributor, direct. So far so good. Comparing to other known vintage tubes. Also following AudioNote’s recent use of PSVANE tubes in their preamplifiers, amplifiers, integrated amplifiers.

GOAL:
Find something "close enough" and hoard away all my vintage tubes. An improvement is always great too.  

COMPARISONS to vintage, others:
-Currently comparing to my vintage stash of 1960s Mullard "Blackburn", Tungsram, RCA, Sylvania, others.
-Also comparing to prior 2012 versions of these same PSVANE tubes made over eight years ago.
-No need to compare to new re-issue Mullard or JJ or other. Seems these new PSVANE are on a different level.

INITIAL Impression first 20 hours:
-a tad harsh and grainy
-midrange is obvious
-top end not rolled off
-sound stage front row, initially
-decent, interesting

AFTER 72 hours burn-in:
-smoothing out nicely, not there yet, close
-sound stage dropping back to mid-hall
-texture starting to come in
-nice midrange, top end smoothing out more
-tone of piano and guitars shaping up nicely
-Nice, haven’t pulled them yet!

APPLICATION
My mono tube amplifiers
(2) Input tubes; 12AU7s
(2) driver tubes; 12AT7s
Friend testing in his preamp
(2) Input, preamp: 12AX7s

------------------------------
REQUEST:
Would like to hear from others who’ve re-tried recent 2020 production of PSVANE 12AU7 or 12AT7 or 12AX7 ?
What are you hearing, are they better than prior PSVANE versions you tried years ago? Similar findings or ???





decooney
audioman58's avatar
audioman58
4,129 posts
 
I agree the new are series is very well balanced better then 
most out there .I have  the 12ax7
the only tubes much better are the Old Amperex 1950s D getter
tubes which are 4x the cost the old SH Siemens Halsey early 60 s have exceptional detail and well balanced ,the Amperex a bit warmer  both are exceptional . Early 50 s RCA warmer and very musical ,not quite as resolved 
but a deeper warmer presentation , your system will dictate which is best . If modding I am using the Excellent VH Audio Odam 
coupling capacitors ,up their with the best and very fair priced.
I just took a black ice wifi Dac and totally upgraded it top to bottom very good ,and night and day better then the respectable stock model. I mod everything I buy ,I wanted others to know 
these new VH capacitors are special and a +/,especially if space is tight.
decooney OP
1,964 posts
 
Great to hear on the caps, I do the same with my DAC, preamp, Mono tube amps. It was not until I upgraded the four main coupling caps in my tube amps (to something significantly better) did I really start to hear absolute definable differences (major in some cases) with tube or cable changes throughout the entire system.  

AU7, AT7 tube changes in my amps or 6SN7 tube changes in the preamp are notable now, to a much higher degree with much better caps. The only downside to the cap changes is now I want to keep all of my tubes, each offers a different benefit and sound in different ways.  Good fun.  
milpai's avatar
milpai
2,369 posts
 

I recently ordered the new Art Series for my Rhumba preamplifier and compared these tubes with the older series tubes. The very first thing that I noticed is the bass - there is something in this bass that you cannot miss. It is damn tight and tuneful. Not that the previous version did not deliver the bass - it is just that this new series has more oomph and sounds more musical. Love it! The midrange is more "there" rather than sounding warm/cool. The instruments sounds spread in the background which makes it sound more realistic. Also I find that the top end does not have the etch compared to the previous version. But this difference is so small that you have to listen to it super carefully. The thing that took me by surprise is that these new versions were not as hooty as the previous version - even when new. I am very happy with these new tubes.

I wonder if anyone compared this new ART series 12AU7s with NOS tubes. I don't think I will chase after NOS, but would like to hear from folks who have personally experienced both.

decooney OP
1,964 posts
 

@milpai... "The midrange is more there"..

Two questions. Can you share more -  

  • Is the midrange less laid back and more forward now with the Art Series?
  • How many burn-in hours do you have on them so far?

 

milpai's avatar
milpai
2,369 posts
 

@decooney ,

I did not find the midrange to be more forward nor laid back. But it has more "presence", such that the you can "see" the music better. Vocals feel more real to me. But all this is after letting the only about 30 hours of burn-in. Honestly I like this tube and I don't think I want to focus on the hours. I would rather enjoy the music that they make.

But again - the bass improvement is just so good. I hope this continues. If it improves, that that wold be a bonus. BTW, when the tubes were new, I kept them "ON" for the first 24 hours. Then for the past few days I have I warm up the tubes an hour before listening and promptly switch them off after I am done listening. So more rush to burn them.

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