2019 300B tubes that are worth the money?

@davidaaa,

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

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.

The most solid 300b tube in my experience is the EAT. I have the Takatsuki as well, good sound but less solid construction. The EAT tubes are not well known but highly recommended

+2 on Takatsuki. Rarely mentioned but superbly robust and powerful: EAT.