Elrog 300B vs Takatsuki 300B tubes

Brownsfan, the current incarnation of the Frankensteins have an HT fuse that protects the Frankenstein in the event the 300B tube fails. If you have this version, your amplifier should not have been damaged by the Elrog's failure.

Tmm, Is the 2nd fuse internal? Externally, there is only one fuse visible, the standard mains fuse.

Brownsfan, on the most current model the HT fuse is external. To be safe, I would ask a technician to evaluate your Frankenstein to make certain the tube's failure did not compromise your amplifier.

Bill,
If it's any consolation my Frankenst MK II (purchased 2009) is much older than yours. Fortunately I suffered no amplifier damage when the original Elrog went bad. I just popped in an EML and all was fine.
Charles,

Unfortunately, the prudent thing is probably to wait until the dust settles and Elrog solves the problem. I am rather impressed that Elrog produced a pair to match Charles' amp. Charles, did Elrog make a pair to your specs? Or did they cull their supply to identify the right pair. As I understand it, there is a certain variability in actual specs for all tubes - a typical bell-shaped curve.