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New to tubes-what the heck does NOS mean?

I checked 50 posts in the forum and saw many references to "NOS" but didn't see what it stands for. Tell me please?
Also, any opinions on good values in EL34 tubes? I've read some good things about EH (Electro-Harmonix) being a good output tube VALUE. Your comments based on actual listening experiences are appreciated.
Thanks and happy listening!
myraj
myraj OP
351 posts
 
Thanks all for that NOS information!
Your continued comments about EL34 output tubes are apprecited.
Happy Listening!
natalie
404 posts
 
Buyer Beware. Be careful lots of old out of spec tubes being sold as NOS. They ar NOS but where not to factory spec. Being passed of as the OLD Classics. They have the name but not the sound.
clueless
763 posts
 
I thought it was Never On Sunday. You mean i've been giving them a day of rest all these years for nothing? I guess I have to read the manual again.

Sincerely
I remain
bluebottle
18 posts
 
new old stock. the reason that nos tubes, for the most part sound better and last longer is because of the vacuum pulled on the tube in the manufacturing process. because of current high production rates vs nos tubes "they were allowed the time to pull a stronger and longer vacuum".
tim
philjolet's avatar
philjolet
2,306 posts
 
buy your tubes here, Vintage Tube Services, I found him to be WAY more friendly and helpful than Kevin Deal (at Upscale).

His tubes are just as well tested and he will talk and help.

http://vintagetubeservices.com/
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