[R-390] Fake 12AX7 tubes- Revised

[Perry Sandeen]

GM List,

My train brain got ahead of my thingers on the last post.

Here is a listing I saw recently on epay: Tube 12AX7/5751/7025. So here is the problem. They are
similar BUT  not the same.  Here is information I got from the N7JP site, Triode Electronics, and
Vacuum Tubes, Inc pages

12AX7 = High-Mu Twin Triode.  Amplification Factor .......................... 100

5751= High-Mu Dual Triode.  Amplification Factor .......................... 70   
Special-Quality (SQ) Premium Tube. Improved-reliability, trustworthy long-life type.

7025= This type is identical to type 12AX7A except that it has a controlled equivalent noise and
hum characteristic.

So what tube are you getting?  Will the one(s) you get work for your specific application/intent? 
Since these are at best improperly labeled I stand by my definition of the product.  Regards,
Perrier


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com