TAD Tubes: What does this number mean?

  • Thread starter Thread starter lukeburke1
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lukeburke1

lukeburke1

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My amp came stock with a pair of TAD EL34B-STR tubes. They had this label on the base of them, and I'm having a hard time finding any info on them online. Their website shows a different, more detailed tube label than this. I'm assuming that this number is supposed to be similar to the Groove Tubes early/late breakup rating scale, but I can't find anything to confirm that. Can anyone here tell me that this number means?

Thanks!

2016-11-07%2019.48.52_zps3kkh90gd.jpg
 
The number is what would be the corresponding number for matched set tubes (I think)
 
But TAD advertises this label on their site, which shows the plate current and Gm of each tube for matching. I'm trying to find out what makes a tube rated a "1" different from a tube rated at a different number

tad_el34b.jpg
 
I'm assuming it's a tube matching number. What amp is it out of?
 
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