[Johnson] Slightly off topic but hoping someone may know: Eldico SSB 100F final tube

[Joe Y]

Hello All,
I recently picked up an Eldico SSB 100F and noticed
that it has in place of the 5894 final tube a 7854
tube. Is anyone on the list familiar with this rig and
know if it was common to swap the final tube for
better performance or more output?
I apologize again for being off topic with this but am
unable to find much info on this particular rig.
Thanks very much,
Joe

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