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Old Legendary tubes vs New Kids on the block Amperex/Siemens/Tele vs Psvane/TAD/Shugaung

Posting this on amps board, as pre tubes can make quite a dif on the amp ound. 
I just sent off all my oldstock tubes to a  guy who will sell them for me on ebay,,I am going all ~New kids on the block~ pre tubes. 
I am saying goodbye to my fav~ Amperex BB.s 
The only old stock i am keeping are the 2 tall bottle SQ Philips EC180's which will go in the AU section of the Defy,,i love the cool looking tall bottle of the EC180,'s, But i also bought some Psvane Au's , a sthey look quite impressive with taht double plate at the top,,,Will add some TAD AU's also on wish list, they also have thae cool looking double plate./high tech components.
I will roll the 3 labs, and see wich has the finer resolution/soundstage.
The 4 AX's will have to be the Shugaung, Maybe later on will add the TAD.
The cayin cd17 takes 4 6922's, for those I will go TAD, as they have the cool looking double plates. 
Which brings up this Q...will the old legends hold their top $ prices going forward, as folks begin cking out the new labs offerings, 
Psvane/Shugaung/TAD. 
I've not heard any of the new, as yet, I have the AU's/AX's arriving later this week. Since i sent all my old stock au/ax's off, can't compare to these new labs. Only compare from what i reacll the Defy sounding like  with Old stock. 
However as you guys know i still have that cheap chinese clone which is crippling the Defy's performance. 
The cayin SC6 is still a ways off, so a  true compare could only be made at that time. 
The cayin has 4 AU's, will roll both TAD and Psvane T series AU's. , Psvane has a  new ax out called T series,,,I will buy both the Psvane and the TAD, see which comes out for high resolution of fq's. 
Have you guys heard any of these newer labs, vs the old legends. 
On the power tubes, I have EH KT90's and also chinese KT88's i bought cheap off ebay,,so will roll those  when the front tubes arrive. 
Will not rebias the amp,,it will be a  justa  shortb 10 minute testing.
If I like the 88's over the EH90's,,I will add the Psvane KT88 C version to wish list, The C version is the newer KT88 from Psvane called the Classic 88, the older version is called the hifi 88. 
I will post notes over the comming year as these tests will be ongoing during the year 2020. 
What say you about these new kids on the block?
mozartfan

Showing 5 responses by markusthenaimnut

markusthenaimnut's avatar
markusthenaimnut
354 posts
 
Jackd,

I am glad you have a nice supply of vintage tubes. And envy the fact that you picked them up two decades ago so you have a good Supply. But I'm curious what experience you have with the new production tubes to be sure that your opinion is based on fact and experience? I'm not trying to pick a fight, and I'm sincerely asking the question. Have you tried the new production tubes? As a 6sn7 addict I've read a lot of threads where people have gradually come around to really appreciating the new production Chinese tubes. And saying in some cases that they prefer them to the New Old Stock tubes.
markusthenaimnut's avatar
markusthenaimnut
354 posts
 
jmolsberg -
Thanks for that. I notice your reference to the shuguang WE6SN7. What tone are you getting from this tube?
I like a balanced tone. Maybe tending towards *rich*. Or phat. I suppose that translates into a fully-fleshed-out midrange. But I don't want a sloppy midbase or deep base. I'm sensitive to annoying treble, but my 66-year old hearing begins to fall off above about 8000-9000 Hz...
markusthenaimnut's avatar
markusthenaimnut
354 posts
 
Thanks for that.  

Next  question:

I often read about the need to let tubes burn in.  Shouldn't that guide our thinking and evaluation process to ensure the comparisons are fair? Not sure how much burn in is enough...
markusthenaimnut's avatar
markusthenaimnut
354 posts
 
Mozart,
Sounds like fun and looking forward to the video.  Question - what's the rest of your system? Aren't  the Defy 7's unobtainium from the golden age?
markusthenaimnut's avatar
markusthenaimnut
354 posts
 
I just wanted to say that I think this is a great thread. Here's the reason, and that is that there is a very wide range of experience with tubes on this board. And this is a good opportunity for those who have more experience to shed their no kidding experience with those of us who might be relatively new to tubes. 50 years ago I was running an eico st-70. Then about 40 years ago I switched over to a luxman solid-state. Then about 30 years ago I switched over to Naim equipment. Then there was a time about 15 years ago when I switched over to a dynaco st-70. But I was using a solid-state preamp. Now I'm using the supratek Cortese all tube preamp. And I think it's totally awesome. But I don't have much experience with tubes, or rolling tubes. It's something I'm fascinated with but I don't really have the experience that some of you guys have. So This Thread is really good for somebody whose relative newcomer like me.
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