Hi All,
On July 4th, I ran my coil designed for my SISG circuit, however, I
did not run it as an SISG. I ran it with my VFD RSG instead. I had 1
day to install the motor, stationary electrodes, wiring, etc... I was
in a hurry. I finished the basics Thursday. About noon on the 4th, I
set the coil and components out in the driveway. I didn't do a test
run until about 5pm. Two problems occurred. Ballast variac was arcing.
Found one of the terminal wires arced to the variac chassis. Fixed it.
Then shorted the feeds at the coil base. Fixed that. I ran it for
about seconds after and left it until dark.
I ran it 3 times during the fireworks and all. The 2nd run was not so
good and this is what I wanted to show you. It just so happened that
my buddy down the street showed up for that particular run and brought
his video camera. So I was able to at least get that run on video.
It's probably good to identify visually when a coil is not well tuned,
is running poorly, striking the primary way too often (poor field
control), and just all around lousy performance (what we want to
avoid). So I have a video of sorts for that particular run if
interested. In the last run of the night, I turned the voltage up and
increased power enough to get past most primary strikes, but there
were still a few (longer sparks and some ground strikes, but still not
up to par).
The following run is a medium power setting which is not always good
for the coil. Just enough power to play havoc with the primary.
On a positive note, you can at least hear the VFD rotary. Normally,
when control is good, I have more fun just fooling around with rotary
speed. But not so much this time. Of course, friends and neighbors
watching had no clue how bad this run was.
http://www.classictesla.com/july4th.html
Take care,
Bart
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