@plasmatron6 Mine own driver with built in interrupter. Same function as wards but different circuit. I don't think using fiber optics is a good idea either.
Nice job hope to see a full power run sometime soon. You might want a boost converter to run even higher voltages ;) That would truly make this coil a mini cm-300 beast.
I raised secondary to run at full power but the coupling seems to suck and primary was getting hot. Ive Got about 7 ft straight out. I think its the limit for this secondary and primary. I was getting some racing arcs and primary to secondary strikes but if I raise the secondary the coupling is not very good and was limiting spark length. It needs a longer secondary. Might have to whip out another secondary.
I'm driving them with one output that goes to two separate gdt's. The inputs are tied together. One for each brick. 4.7 Ohm gate resistors. I need to scope the gates to see how they look with these values.
Sucks about the job. I'm broke but fortunately I had all the stuff to throw this coil together.
Hi Tom, nice coil!
I wonder why coil has to be taller for full voltage, I'am building drsstc also with CM300,half bridge with doubler, what lenght of sec i should use?
plasmatron6 1 year ago
@plasmatron6 Its really up to you but id say at least 4 feet. Mine was only 2 feet in this vid and it was liming my spark length I think.
Tab54o 1 year ago
@Tab54o thx, for responde
My next questuon is, what driver and controller are u using? :)
plasmatron6 1 year ago
@plasmatron6 Mine own driver with built in interrupter. Same function as wards but different circuit. I don't think using fiber optics is a good idea either.
Tab54o 1 year ago
Nice job hope to see a full power run sometime soon. You might want a boost converter to run even higher voltages ;) That would truly make this coil a mini cm-300 beast.
Any data on power usage during these tests?
Dalus01 2 years ago
I raised secondary to run at full power but the coupling seems to suck and primary was getting hot. Ive Got about 7 ft straight out. I think its the limit for this secondary and primary. I was getting some racing arcs and primary to secondary strikes but if I raise the secondary the coupling is not very good and was limiting spark length. It needs a longer secondary. Might have to whip out another secondary.
Tab54o 2 years ago
Really awsome coil Tom!
Have to put one on my project list...
teslina 2 years ago
Hi Tom,
Now i'm real envious!
Are you driving the CM300's directly
from a GDT? or two?
I want to make a similar coil, but i've just been made redundant so its on hold untill i get another job.
All the best,
Mel
bennem1 2 years ago
Hey Mel,
I'm driving them with one output that goes to two separate gdt's. The inputs are tied together. One for each brick. 4.7 Ohm gate resistors. I need to scope the gates to see how they look with these values.
Sucks about the job. I'm broke but fortunately I had all the stuff to throw this coil together.
Looking forward to seeing your next project.
-Tom
Tab54o 2 years ago
Tom... Why are your primary and secondary out of phase?
cheeseboat15 2 years ago
because the streamers bring the secondary into tune with the primary.
Tab54o 2 years ago
I see.. nice coil
cheeseboat15 2 years ago