Tube Ratings

[metalmm785]

Hi, all:

I recently bought a new set of tubes for my two dual rectifiers. One set was from thetubedepot and they were marked with 16-17 numbers on the tubes. The other set was from Ruby Tubes and the number was in the high 30s, which is more of what I expected.

Does anyone have tubes in their dual recto from the tubedepot and what number did your tubes have written on them? I am curious since the numbers are so far from each other.

 

[DrKev]

Do we even know what the numbers are and if everyone measures them the same way? Are they at all comparable?

 

[Fiveband]

If everyone on the board would purchase a MaxiMatcher, we could compare readings from the entire population of tubes and do away with all the uncertainty.

 

[metalmm785]

Do we even know what the numbers are and if everyone measures them the same way? Are they at all comparable?

Unfortunately, vendors measure them in different ways. Kinda why I was wondering if anyone had similar readings for a Dual Rec from the Tubedepot.

 

[swbo101]

I believe those numbers are supposed to be in ma. I've bought a lot of tubes from Tube Depot over the past 10+ years with no issues. I always tell them what amp they are for (Mark IV) and that I need a middle rated tube. My EL34s are usually upper 20's to low 30's. However I did once get a pair measured at 44. Had no issues, My 6L6s are usually in the low 20's.

Hope this helps.