[Ultrainferno]

Quote:

My understanding is the 2399 is the same as the 5998, both made by Tung-Sol. Tung-Sol also made some 5998 which are branded by IBM, but are the same as any other 5998.

 
Tung-Sol / Chatham/ The 2399 are mostly labelled Chatham. I have white and yellow labelled ones
 

 
Some are clear tops, some are like the ones shown above with the top getter

 

[Dubstep Girl]

Quote:

Tnx Dubstep,
 
Please correct me if I'm wrong---Is the 2399,the same as the 5998,or,the 5998a?
One is made by IBM,the other by Tung-Sol-right?
 
Yes,Nikolay from Tube maze,has some pretty good stuff,,I've bought a few from him,and he's a pleasure to deal with.
Yesterday,I picked up a Tung-Sol 12au7 black plate..,if it's half as good as the 5998,I'll be  happy.
 
Mike

 
 
yeah 2399 is the same as 5998. 5998A is way different (similar to 7236 but theres a few differences as well).  
 
I think tung sol made all the 5998's.

 

[hodgjy]

I know this thread already has 767 posts, but we're going in circles here.  All the answers to the last 50 questions appear earlier in this thread.

 

[Ultrainferno]

Yes, it's getting worse on head-fi. People don't want to learn it seems. Sometimes I spend 4 days reading threads with multiple hundred pages. I take notes and learn, but hey, who am I

 

[hodgjy]

Quote:

Yes, it's getting worse on head-fi. People don't want to learn it seems. Sometimes I spend 4 days reading threads with multiple hundred pages. I take notes and learn, but hey, who am I

 

[Thaddy]

Quote:

Pass me a beer, I've been learning the same stuff for almost 10 years 

 

 

[Skylab]

As it relates to the 2399, I'm not sure it's ever been established that its completely identical to the 5998 electrically. It's undoubtedly some slight tweak or variant of the 5998, and the looks are quite similar or course, but since I have never seen a data sheet on the 2399, not sure what exactly its specs are.

I also have tubes marked 6520 that appear to be 5998's internally even though 6520 is supposed to be an identical designation for the 6AS7G.

I'm sure Tung Sol had its reasons for all this, but its hard to decipher 50 years on.

 

[mikek200]

And for this ,you get a case of beer,your choice ,may I suggest  ,Becks??
 
Many tnx's skylab
Will start to do ,more reading
 
Mike

 

[GrindingThud]

I don't think I've ever been more excited over a tube than today. I finally got to unbox an elusive TungSol 7802WB. http://www.mif.pg.gda.pl/homepages/frank/sheets/077/7/7802WB.pdf
Ceramic spacers, graphite anodes, and a transconductance of 20,000! It's heavy....106 grams heavy, and a bottom end to match. It's fast, it's a bit cool, not warm, not fat, not round, not veiled.....is it really a tube? The soundstage is insane...really wide, but well damped and not artificial. Listening to Mara & David, Once we were Gods...outstanding vocals and string plucking. The tube takes a very long time to warm up, making twinking noises until the temp stabilizes. Too soon for me to rank it amongst the others.

 

[rosgr63]

Very nice and interesting tube, well done!

 

[Dubstep Girl]

is it like 6080WB?

 

[GrindingThud]

Looks just like it, sounds similar, but with a little more power and lower output impedance in a cathode follower...kind of like a 7236.
Quote:

is it like 6080WB?

 

[Dubstep Girl]

oooh interesting.

 

[Dubstep Girl]

just got my gec 6as7g's omg theyre amazing.

 

[Silent One]

Congrats, this is wonderful news. In other news, I'm going Live on Twitter: Listening Party @ Dubstep Girl's Place! 

 Okay, maybe not. Perhaps, you'll get back to us by Labour Day Weekend...