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In this multi part video, we test the modifications we have done to this amplifier. This is rewiring the front end 6SN7 driver to a cascode design to drive the 300B correctly. TL;DR Cascode wins!
I have plans for further mods to increase the reliability and some cooling issues I see. Plus some heater wiring tricks etc. so check back soon!
After what I learned from mods to my personal DIY 300B build, this A50 should turn out sweet! I'm going to use a LED/resistor combo for bias on the cascode + add gridstopper resistors etc.
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