Those ELROG tubes look good, hey?Just for interest's sake https://vinylsavor.blogspot.com/2023/12/tube-of-month-300b.html?m=1
His very last in the "Tube of the Month" series .
It was also interesting to read the history of the ELROG tube manufacturing business.
I would like to hear a pair of those thoriated tungsten filament 300B's!