Carbon brushed can be obtained at your local auto parts store. They generally have a nice selection of alternator rotor brushes. Just pick out the ones you like. Generally, rotor brushed are fairly small. Better yet, they are easily carved into shape. AD0TJ
As its 3D printed, a screw type ridge could be incorporated so as to make winding easier? Also, since its is 3D printed, holes could be made, which I not sure of, decrease capacitance?
I think you are right on both. I did not make a plastic shaft because it might warp, the seams of the 4 halves would catch on each other, etc. And it was easier to transfer the electricity via the metal shaft.
@@tsbrownie Perhaps you miss understood me, or I misunderstand you. I was talking about the spherical windings of your 'globes'. As the wire slips on you, perhaps little ridges might mitigate slipping.
@@franzliszt3195 I thought about that, but even very small distance between wires change the inductance a lot. Even thick insulation makes a difference. Also, it's very hard to print a thin spiral. ;)
@@tsbrownie Yes, indeed. Looking around the insulation thickness can vary by x2. If I were going to get a 3d printer for this type of project, which would you recommend?
@@franzliszt3195 That's really a money vs. needs question. The best channel I know of for 3d printing reviews and such (since I only have experience with a now heavily modified Ender 3 Pro) is Aurora Tech. If an Ender 3 will work for you, they can be had for around $100 second hand. But they are not as precise as the newer models by other companies.
Carbon brushed can be obtained at your local auto parts store. They generally have a nice selection of alternator rotor brushes.
Just pick out the ones you like. Generally, rotor brushed are fairly small. Better yet, they are easily carved into shape.
AD0TJ
It looks very aesthetic. It will probably work fine. However, it is time-consuming and difficult to perform
Interesting, i have a 1920s Kellogg wavemaster radio that tunes with those
Thank you as always for the great content
My pleasure!
As its 3D printed, a screw type ridge could be incorporated so as to make winding easier? Also, since its is 3D printed, holes could be made, which I not sure of, decrease capacitance?
I think you are right on both. I did not make a plastic shaft because it might warp, the seams of the 4 halves would catch on each other, etc. And it was easier to transfer the electricity via the metal shaft.
@@tsbrownie Perhaps you miss understood me, or I misunderstand you. I was talking about the spherical windings of your 'globes'. As the wire slips on you, perhaps little ridges might mitigate slipping.
@@franzliszt3195 I thought about that, but even very small distance between wires change the inductance a lot. Even thick insulation makes a difference. Also, it's very hard to print a thin spiral. ;)
@@tsbrownie Yes, indeed. Looking around the insulation thickness can vary by x2. If I were going to get a 3d printer for this type of project, which would you recommend?
@@franzliszt3195 That's really a money vs. needs question. The best channel I know of for 3d printing reviews and such (since I only have experience with a now heavily modified Ender 3 Pro) is Aurora Tech. If an Ender 3 will work for you, they can be had for around $100 second hand. But they are not as precise as the newer models by other companies.
Nickel has a relative premeability of 100 of 300 pre the great wikipedia. I would think that would cause some problem, but not sure how. Any one?
I addition, the web seems to say Nickel work hardens.