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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
mozartfan OP
2,143 posts
 
Hi mark
I like this word, ~~Unobtainium~~~
Not sure what the potential of the Defy7 really is...how to max the design of this ~~esoteric amplifier~~~.
The New jadis Defy 100 replaces the Defy7, I think its ugly vs the sblime design of the Defy7.
So yeah, 
'cayin cd17 mark1, the Mark 2 looks very close design, added a  rectifier tube. , near same price as what i piad back in 2004. 
Seas Thors , kit from Madisound , back in,,,,2003ish. 
Then we have the clone jadis pre, Lite LS9, has 6 AT's, and several other tubes. 
After listening to several YT vids with the KT120's, not for me, its too forward, The KT88's offer tons of power and clarity. 
I think its a bit ofa  gimmick the KT120's. at least for home audiophile needs. 
I'm bidding on a  lot of 6 Tele AX's, ends in 5 minutes,,gotta run.....
puffball08's avatar
puffball08
311 posts
 
This would be a good time for reviewing the long out of print magazine "Vacuum Tube Valley" (last issue published in 2003 due to the untimely death of the publisher Charlie Kittleson).

http://www.jumpjet.info/Pioneering-Wireless/eMagazines/VTV/vtv.htm

Particularly check issues #1, #14 for detailed articles about 12AX7 and issue #3, #8 for articles about 300B.

Nearly all the common (and some not so common) vacuum tubes used in audio applications are reviewed in depth, both NOS and new (up to 2003) manufacture.

They are PDF files and can be easily downloaded and printed if desired.

d.
mozartfan OP
2,143 posts
 
Great find, VERY VALUABLE
Thanks

http://www.jumpjet.info/Pioneering-Wireless/eMagazines/VTV/VTV14.pdf

My link brought me right back to your link, I had to google 
Pioneering Magazine 12AX and was brought to audiokarma's topic, which gave a link to get to the article. 

bsmg
296 posts
 
Someone noted above that all new tube audio equipment comes with current production tubes. That is because if the manufacturer used NOS tubes the unit would cost hundreds more than it does. The only tubes currently being made are either from Russia or China. My amp came with 8 tubes made by Electro Harmonics; they probably cost the amp maker maybe 80 dollars. The 8 tubes I now have in my amp cost me about a thousand dollars. And some of them are nearly as old as me; 65 years. Those 8 tubes have been in the amp for over seven years. 
markusthenaimnut's avatar
markusthenaimnut
371 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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