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SSTC VTTC Hybrid



Original poster: "Jim Mitchell" <Wrenchead-at-starband-dot-net> 

I got some large 600v triacs, and would like to try to make an sstc vttc
hybrid by driving the grid of a large power tube with a variable frequency
from a TL494 or a 555 timer.  Any idea how I should wire this up, As the
grid needs around 400v to interupt the flow, instead of a grid coil, this
would be used, any suggestions?