Ruben Schoonbaert
Member
So my wire is multible strands... but i found some PE wire that has a single copper core.
It has a core of 2mm in diameter and its 4mm in total with the insulation included.
So my wire is multible strands... but i found some PE wire that has a single copper core.Hold your horses, we'll get to that.
The calculator I just provided for you is for a pancake coil. You can always change it later if it seems necessary, though you'll need to tap ("tune") it differently if you do.
Start by constructing the coil as described so far with the correct topload and primary coil. I recommend using bare copper wire for the primary - it will make it easier to tune later on. Give it 20 or so turns if you can. Take photos and post them here so I can see how things turned out, and then we can go from there.
Ok, that sounds better. Insulation diameter doesn't matter, just the actual wire diameter.So my wire is multible strands... but i found some PE wire that has a single copper core.
It has a core of 2mm in diameter and its 4mm in total with the insulation included.
11.32 windings so i guess ill make 12 windings.Ok, that sounds better. Insulation diameter doesn't matter, just the actual wire diameter.
Using the calculator, put in 0.2 inches for "S" (spacing between turns), 0.0787 inches for "W" (wire diameter), 2 inches for "D" (inner winding diameter), and 15.4 (microhenries) for "L" (desired primary coil inductance). The resulting "N" will tell you how many turns you need (you will want more so you have room to "tap" the coil in order to tune it) and "Do" tells you the outer diameter of the primary coil.
11.32 windings sounds correct. That being said, you should allow quite a bit extra, just in case. I suggest using at least 15 turns. This gives you plenty of room in case our calculations were off slightly. By tapping the primary coil in different places you can hone in on the exact frequency to match that of the secondary coil.11.32 windings so i guess ill make 12 windings.
Found this template of a spiral that has 0.5cm between the turns, would this work?11.32 windings sounds correct. That being said, you should allow quite a bit extra, just in case. I suggest using at least 15 turns. This gives you plenty of room in case our calculations were off slightly. By tapping the primary coil in different places you can hone in on the exact frequency to match that of the secondary coil.
Put it in the calculator. I gave it to you for a reasonFound this template of a spiral that has 0.5cm between the turns, would this work?
So apparently 4mm wire is almost impossible to bend into the disired shape, so i bought some (core):1.5mm wire wich is mutch easier to bend.Put it in the calculator. I gave it to you for a reason
Just remember the dimensions in the calculator are in inches, not centimeters. You'll have to convert from one to the other. Also remember "S" is the spacing between turns, not the center-to-center distance between turns. You'll have to make sure you use the wire diameter to calculate the spacing between the turns (look at the graphic in the calculator for clarification).
All that being said, 0.5 cm is pretty close to the 0.2 inches (0.508 cm) I used in my calculations, so I don't expect much of a difference.
So i think theres a fault in my calculations because i'm getting an errorSo apparently 4mm wire is almost impossible to bend into the disired shape, so i bought some (core):1.5mm wire wich is mutch easier to bend.
Could you be more specific please? Which calculations? What error? Screenshots would be helpful here.So i think theres a fault in my calculations because i'm getting an error
So i filled in 2 for SCould you be more specific please? Which calculations? What error? Screenshots would be helpful here.
Your spacing and wire diameter is 2 inches???So i filled in 2 for S
0.039370 for W
2 for D
and 15.4 for L
But i am not getting an "N"
Oh, Damn imperial systhem got me again.Your spacing and wire diameter is 2 inches???
As I said several times, the measurements in that calculator are in inches, not millimeters, so you need to convert the units before putting them into the calculator.
Oh, Damn imperial systhem got me again.
So its 11.45windings
I am... also i wanted to make more windings but i ran out of wire :I.Are you familiar with the process of tuning a Tesla coil?
It's impossible to say if you don't try it. Go ahead and fire it up, and try tuning and adjusting the spark gap. See what you get at this point. You may need a breakout point on the topload.I am... also i wanted to make more windings but i ran out of wire :I.
Do you think the tesla coil will have enough power to ionize air ?
I tested it and i am getting mutch better results.It's impossible to say if you don't try it. Go ahead and fire it up, and try tuning and adjusting the spark gap. See what you get at this point. You may need a breakout point on the topload.
Greetings Ruben,
I am happy to hear that there have been improvements to the design. I do still think that it should be possible to ionize air, though the coil is relatively large for a LOPT. Do you know how much current the transformer is supplying to the arc? You may be able to get significantly better results using an old style NST.
Could you post a video of just the LOPT running (and arcing)?
Regards,
Matt
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