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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
 
If asked which tubes I like best  1950s Amperex D getter 
Herleen factory very well balanced classic great tube
all later tubes had O getter. Around $400
decooney OP
1,964 posts
 
@audioman58
Good to know on the new PSV Art series. A friend with a recording/mastering studio messing with tube DACS recently tried them with similar praise, likes them quite a bit. I will say the latest MKII version is notably better than prior years, and glad to hear the Art series is a step above again. Nice. Will be curious what @johnss has to report. My newer MKIIs did have an odd burn-in cycle, went dull real fast after 100hrs and then opened back up nicely with more time. Using them in my mono amps.Can hear deeper into the soundstage than some of my very best vintage NOS and tried more than 25 different pairs, some with perfectly matched curve-tracer tested triodes. Nice to have new options too.  
audioman58's avatar
audioman58
4,129 posts
 
For hose who say they hear no differences in breakin , what  is the quality of your 
gear ? I have been into audio over 40 years  and without questions the metals 
settle in and can take a solid 100:hours.  To say  no difference 
there something not right , just like with audio cables the metals and dielectric settle in before sounding at their best l . Emmisions labs premium tubes even 
have a tempering cycle ,on,off especially for power tubes to temper the metals for longest longevity. I turn them off for 1 hour very 24 hours on small tubes
 every 12 on larger tubes for the first  150 hours. There is some truth to tempered the metals ,not 100% guaranteed. But  there is some truth to this . Your option.
milpai's avatar
milpai
2,369 posts
 
To say  no difference there something not right

"Sorry, our measurements do not show that"
                      - Engineers and Scientists at asr forums
johnss
569 posts
 
Over the last 2 weeks or so, have been listening to the new PSVANE Art series of 12AU7-S and 12AX7-S.Short reply is, the new ART series is a very nice, organic sounding tube. Tried both AX7-S and AU7-S. (AU7s in preamp, AX7s in phono stage.

Compared AU7-S series to NOS Telefunken AU7s, PSVANE T-IIs, Shuguang T series, Shuguang TG black carbon series, Mullard Blackburn 12AU7s, RCA black Plate 5814s..

Compared to original 'VANE T-II series, the new Art series has the top end brightness tamed down, still plenty of detail, much more organic midrange, similar bass performance. Very good imaging. Would fit the ART series in between the T-II series and the Shuguang TG series on brightness and midrange qualities. For some, the T-II VANEs were very revealing, but may have been a touch on the lean side. The new ART series is more open sounding than Shuguang T series or TG series, with similar midrange qualities of these two Shuguang tubes. Tried the AU7 brands in two different preamps, with similar results. Would have to say PSVANE has done their homework on materials used in the plate and cathode construction. The new ART series seems to be a well balanced valve all the way around. Ordering several more sets this afternoon.



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