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Registered Member #154
Joined: Sun Feb 12 2006, 04:28PM
Location: Westmidlands, UK
Posts: 260
Hi Folks,
Just finished this DRSSTC by mounting the topload. Now for some tuning with low volts. I must learn how to tune these properly instead of just tuning for largest output spark at low voltage on the bus. I always seem to build them first and do tests later instead of what i should do, is to do tests with its guts out.....lol JAVA TC estimates my tuning point to be 4.65 for approx 200Khz so for a starting point i've set it to this recomendation. Is this how you guys start with tuning?
(on reflection, i should have put this thread in the 'projects section' sorry moderators! )
Registered Member #154
Joined: Sun Feb 12 2006, 04:28PM
Location: Westmidlands, UK
Posts: 260
Well...Today i decided to try and fire this thing up, i applied 30 volts to my bus line. Not a sausage! i reversed my primary feedback connections, still no 'rasp' of any spark output. I dismantled everything only to find that my primary feedback input was short circuiting to earth when the lid of the box was on. Now with 30 volts on the bus, my primary tapped at 4.5 turns and my intterupter set at 100us and 100Hz....i get a 6 inch spark to a grounded rod. still needs tuning. As i live in an appartment block, my neighbors below me came a knocking on my door saying that everytime they heard a 'buzzing' noise from my flat, their digital tv picture would 'freeze'.....and demanded that i stop whatever i was doing immediately!........lol Did Dr Frankenstein have this problem?...i think not!.....lol
Damn.....i will have to take it to work with me next week to see its full potential Its just as well i work in a large open spaced workshop!
Registered Member #123
Joined: Fri Feb 10 2006, 12:58PM
Location:
Posts: 162
Hi Mel, Coils looking really nice. If your coils are anything like mine it won't be the output of the coil causing the problem. I found with a filter on the mains and using SY mains cable (braided) with one end grounded this problem all but dissapeared.
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DRSSTC
