2019 300B tubes that are worth the money?

Tonmy, FWIW, the 300B is not suited to operate well in an OTL amplifier like the Transcendent or Futterman or Atmasphere.

@davidaaa,

pls update as they settle in. I am somewhat surprised at your finding since the Audionote tubes are actually rather good.

On a preamp and please don't laugh the EH 300B sound is incredible

A word of warning if I may:

the SQ of different 300b tubes is dependent on the rectifier tube used: on my Wavac EC-300b when I switch from the EAT300b to the Takatsuki, I equally switch from Svetlana Winged-C 6L6 GC to Tungsol KT66. It gives the Takatsukis a rounded, more bass sound whereas the Svetlanas lead to an over-emphsized treble. Conversely on the EATs the Tungsols sound slightly sluggish and thick.
Tube rolling is a complex subject but well worthwhile.

Let's keep this thread active, but increase it's usability. Please specify what equipment you are using your 300b in. And any details (if available) about bias, driver tubes, etc. Not trying to get too complicated, but I think these details might be relevant to our discussion.

Thanks,
Markus