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Design an entire system for $800? ?
This thread is 21 years old  
Driver Tubes 6922
Then I guess all old tubes should be sold as used, because there is no way to tell.  
Why Can't Modern Tube Manufacturers Make a Proper Tube?
I'm testing out the durability of the Linlai 6sn7 tubes compared to my kenrad's, the kenrad's don't sound quite as good as the Linlai, but I'm still on the durability stage, the Linlai have only been on a year on 24/7 , the kenrad's were on 24/7 f... 
Driver Tubes 6922
@tonydennison the problem is you could buy those tubes you consider new and they may not last or test as new.  
Driver Tubes 6922
@tonydennison  no, but just wondering how you would be able to tell if a tube has never been used? I don't think you can tell, by the boxes or the printing on the tube itself.  
Driver Tubes 6922
@tonydennison  would you consider a tube as new if has been tested over the years hundreds of times, but never used in any equipment.      
Why Can't Modern Tube Manufacturers Make a Proper Tube?
Luckily I live in a 50's house. Built to last. Made by actual craftsmen that care The lumber was way heavier and stronger back then, definitely not put together better compared to today.      
Upgrade q. Preamp, Schiit Freya +
Space tech lab QA115.  
Driver Tubes 6922
Why would you spend the money for a Hickok tester just to test a tube for shorts, a much cheaper tester can do that.  You should just buy tubes from Andy from vintage tube service, I've never heard any complaints about his tubes, but I have about ... 
Driver Tubes 6922
I read about a test someone did on the web, that had several calibrated Hickok testers and got a different reading from ever one of them.  
What is the science behind audiophile fuses?
If fuses don't make any difference then why did most of the high end amp manufacturers stop using rail fuses, it's definitely not to save money.  
300b lovers
I have had the Linlai tennis ball 6sn7 tubes in my DAC for 9 months running 24/7 unless I'm gone for an extended period of time, no microphonics so far. I'm sure the old nos tennis ball tubes could become microphonic because the support structure ... 
If the DAC is the same, how different do CD transports sound?
@jasonbourne71  how do you level match a transport?  
What are the best GaN Amplifiers available today?
Just buy all the stuff ASR approves of then, measurements don't always correlate to sound quality, some equipment that doesn't measure good can sound very good.  
What are the best GaN Amplifiers available today?
@mapman  In the 1980's all the best measuring equipment was supposed to sound the best and now we know that was not true, maybe in 20 years all the current best measuring equipment will not be considered the best sounding equipment. ​​​​​​