Shootout of Nos 6sn7 tubes

I tried the Melz’s 2 years ago, these run hot on my Atmasphere MP-3, bought 2 pairs, 1 tube of each pair died after a few hours, they weren’t that special IMO on my gear, I remember not much bass and very bright, but the RCA red base that it is supposed to be very good too wasn’t that special either. From most tubes I tried Raytheon gray glass and short bottle Sylvania 6SN7W were among the best, I settled for new production Chinese CV181-Z. Let me post a picture of the remaining Melz.

https://www.dropbox.com/sh/x3dhhpbqoc2qjgq/AAC69xScWKrlfDY4aN0tHKhLa?dl=0
Thank you to the OP for taking the time to go over this

Oh I paid $10 for each Melz, there are plenty of old 6N8S like the Melz but black bases OTK, although not the same quality as the Melz should be very close and cheaper.

luisma- If you like the short-bottle, 6SN7W: you should try the tall-bottle (metal or plastic/6SN7W or A), if you haven't already.      I used those, for around 15 years (in concert with my TSRPs, as they seemed to provide better Bass slam, as well as sweeter highs, than the short ones, in my amps.      Same wonderful ambiance recovery and over-all, uncolored tonality.

@luisma

Sorry to  hear your bad experience.

But I think you did not get Melz 1578 at 10$ per tube.

Melz1578 is a special one which cost 100$ per tube or more.

I am enjoying Grieg Piano Concerto  through Melz 1578 now.

I can definitely claim this is the best 6sn7 tube so far.

ButI do not mind using other excellent vt 231s to taste different flavor from time to time.

you should try the tall-bottle (metal or plastic/6SN7W or A),

Thanks but I think that is unobtanium

But I think you did not get Melz 1578 at 10$ per tube.

don't know why you would have to doubt my statement but that's ok, 2 years ago the Melz were not in the demand they are today, as a matter of fact there are more on Ebay today that back then

Luisma

What you got is just regular Melz 6n8s tube.

Melz 1578 is notation for quality certification for military use and nuclear plant.