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Registered Member #1930
Joined: Wed Jan 14 2009, 07:36PM
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Posts: 12
I finally got some free time this summer in between University and work so I thought I'd try and make my very own DC SGTC.
I didn't want to spend any money on this so it's made completely out of scavenged materials. Year old ZVS driver and flyback for Power, some scrap 1" inner diameter pvc for secondary, MOT secondary for secondary wire, assorted spools of speaker wire and liter plastic bottles for some salt water caps.
First order of business was to remove MOT secondary and wind it onto the PVC by hand. Three hours later i had some sliced up fingers and not to bad secondary, considering. Measured inductance to be 0.75 and self capacitance to be 0.03 nF but that could have been purely error from my LCR meter. so theoretical F Res would be 3.3 Megahertz. Starting to feel iffy about this now. No topload yet.
Made three salt water caps to have 3nF each. Used two in series for 1.5 nF.
Spent the next day piecing together the coil then finally powered it up. No break out and too bright to see any corona, but the SG was screaming. I held grounded screwdriver to the output and lo and behold! A 2 mm fine purple arc! After about and hour of changing spark gap length and primary taps I got it to 5 mm.
Then everything went quiet. The PSU still on and everything on the ZVS driver barely warm, but no output. Tried a different flyback but still no output.
Now with no extra mosfets to fix the ZVS I'm back at the drawing board trying to find out what went wrong.
I'll post some pictures if anyone wants, but I am rather ashamed compared to the great works everyone on this forum puts out.
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First Coil (surprised it even worked)
