Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>
Hi Peter, .... Well, I went through your specs. Hard to say what the
power input is. I note you are not ballasting the MOT's, but you did
mention 250V in, 220V at variac at 20A, so I'm guessing if 4 MOT's
are series'd, then output is about 10kV @ 567mA. That was with 92nF
cap (MMC & rolled), so say about 7.3 tap on the 14 turn primary? The
toploads are certainly "goodly" sized for the coil and I see slight
breakout points.
When I input the above transformer data and then ARSG info for the
9000 RPM motor (50 Hz), you are certainly at 1200 bps. In Javatc,
the output spark length prediction for the RSG coil was 108", so I
guess that actually is about what you are getting. I guess that is
due to the 1380 joule*sec across the gap!
It doesn't appear to "me" that the gap losses have increased all
that much (if at all) with a break rate 10 times the nominal 120 (or
100 in your neck of the woods). I did notice a blower? Is that
additional cooling for the thoriated tungsten electrodes? ......
Bart