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Registered Member #1403
Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
Ive read deepfriedneon's guide to build a tesla coil, and he descripes some diameters, heights and number of windings of the secondary coil.
With my limited ressources I can make a 100cm tall / 11cm diameter secondary coil, winded with some isolated 0,5mm^2 wire, would give me 500 windings, would that be a useful coil? I know that if they are too small they will strike to the primary coil, but can they get too tall?
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
MadsKaizer wrote ...
With my limited ressources I can make a 100cm tall / 11cm diameter secondary coil, winded with some isolated 0,5mm^2 wire, would give me 500 windings, would that be a useful coil?
you meant 0.5mm diameter? If my calculations are right you would get 2000 turns not 500. If you really meant cross-section then it's a bit less but still over 1000.
Registered Member #1403
Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
Plasmaddict wrote ...
MadsKaizer wrote ...
With my limited ressources I can make a 100cm tall / 11cm diameter secondary coil, winded with some isolated 0,5mm^2 wire, would give me 500 windings, would that be a useful coil?
you meant 0.5mm diameter? If my calculations are right you would get 2000 turns not 500. If you really meant cross-section then it's a bit less but still over 1000.
I meant crosssection the copper is 0,5mm^2, with isolation its about 2mm diameter
Registered Member #1127
Joined: Mon Nov 19 2007, 12:08AM
Location:
Posts: 139
Well, too many winding = higher than normal resistance. I have a very tall 3.25" X 40" secondary. It is wound with 27 AWG magnet wire.... and produced lovely discharges at 2 kVA. It has the same level inductance as my 4" secondary. So just because you have over 1800 turns doesn't mean the coil won't fire. But do be careful not to go too over board.
Registered Member #1403
Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
MOT_man wrote ...
Well, too many winding = higher than normal resistance. I have a very tall 3.25" X 40" secondary. It is wound with 27 AWG magnet wire.... and produced lovely discharges at 2 kVA. It has the same level inductance as my 4" secondary. So just because you have over 1800 turns doesn't mean the coil won't fire. But do be careful not to go too over board.
I guess the resistance wont be a problem with 20 AWG then
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
MadsKaizer wrote ...
I meant crosssection the copper is 0,5mm^2, with isolation its about 2mm diameter
Ok, but with that thick insulation you may not be getting the optimal power from the coil as this thin wire will overheat much sooner than if it was solid copper with just a thin enamel.
Really i would suggest you to go to your local motor rewinding shop and ask for some wire, it is really not THAT expensive.
Registered Member #1127
Joined: Mon Nov 19 2007, 12:08AM
Location:
Posts: 139
overheat? How much power is put through the coil? Hell, if I run my 27AWG wound 3.25" X 40" secondary at 2 -3 kVA at it doesn't overheat why would his? I'm getting beautiful discharged - the windings are cool to the touch.
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Secondary coil windings and height
