Original poster: "D.C. Cox" <resonance@xxxxxxxxxx>I usually use 4.0 or 4.5 to one with the larger coils. Even up to 6.5 seems to work well also.
Dr. Resonance
Original poster: "Gerry Reynolds" <gerryreynolds@xxxxxxxxxxxxx>For the 1000 to 1200 turn secondary, what is the prefered aspect ratio. Do you still shoot for around 4.5:1 ratio. I can see if one populates this form with a thicker wire and hence reduce the number of turns, the Q would go up and maybe some I^2R loses go down. It seems this would come at the expense of the secondary inductance.Gerry ROriginal poster: "D.C. Cox" <resonance@xxxxxxxxxx>I don't know for sure but think it might be related to the high peak currents involved in the larger units. This could relate to "effective loading" capacitance and inductance values but I have not explored this factor in detail.Dr. ResonanceOriginal poster: "Gerry Reynolds" <gerryreynolds@xxxxxxxxxxxxx> Hi DC,Curious as to why 1400 to 1600 turns isn't optimum with PIG power?? Why does the TC care what the power source is??Gerry R.Original poster: "D.C. Cox" <resonance@xxxxxxxxxx>Most systems respond favorably with a 1,400 to 1,600 turn closewound secondary inductor running with NST power supplies. Systems with pole xmfrs work favorably with a 1,000 to 1,200 turn sec. inductor. Tesla coils like a lot of "power" for good spark output. John Freau's equation works well to predict this behavior.