- Sep 30, 2016
It was designed (and seemingly built?) by a local engineer who's published articles in a major tube quarterly magazine here, but I wouldn't be able to try it out before buying it. Especially since covid, people are mostly just selling things online recently.I would audition it before laying down your money. Also, who designed and built it would be helpful
Edit: One more piece I can add is that it does seem to have a constant current source... but I'm not entirely sure of that one.