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Finally Got an MOT

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Firefox

Wed May 28 2008, 10:38PM

Registered Member #1389 Joined: Thu Mar 13 2008, 12:50AM
Location: Pittsburgh, PA
Posts: 346

Thanks Arcstarter. Unfortunately, as it is, I am strapped for cash. Thats why most of the stuff (read- all but 4 dollars worth) has been recycled from other places, or built using cheap materials. This Tesla coil cannot be an exception due to the aforementioned lack of money. I do plan on getting a few more MOs in the near future, and I just picked up 5 CRT monitors from my JROTC ASI who was throwing them out.

Arcstarter

Thu May 29 2008, 01:15AM

Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253

Firefox wrote ...

Thanks Arcstarter. Unfortunately, as it is, I am strapped for cash. Thats why most of the stuff (read- all but 4 dollars worth) has been recycled from other places, or built using cheap materials. This Tesla coil cannot be an exception due to the aforementioned lack of money. I do plan on getting a few more MOs in the near future, and I just picked up 5 CRT monitors from my JROTC ASI who was throwing them out.

Well if you go here:

you can get 10 free sample capacitors. If you use a tripler with your mot you can use like 15nf which would be 10 capacitors rated at 20kv which is a great rating and would be more than you would need so i imagine it would last a long time. And you can get someone else to order 10 to there house with different email and address and phone number, so you will have backup capacitors.

To make a simple dc motor rotary spark gap i found an old electric scooter that has a nut on the shaft and runs on 24 volts. I just got a hole saw that goes on a drill and cut out a piece of wood about 3/4 inch thick plywood and 5-7 inch around. I then put two screws around the disc, exactly opposite(important!) until i had 8 screws total. I then got a piece of wire and put it around every screw, so that every screw were electrically connected. I put this disk on the dc motor and made to stationary electrode by nailing a piece of wood straight up by each side of the spinning electrodes and put a screw through the wood so that the screws aligned with the spinning electrodes. You will have to make the screws very close so a spark will form. I will post a video for you of the arsg i made using this technique.

Weston

Thu May 29 2008, 02:46AM

Registered Member #1316 Joined: Thu Feb 14 2008, 03:35AM
Location: Cambridge, MA
Posts: 365

Firefox just out of curiosity how old are you?

Arcstarter

Thu May 29 2008, 02:55AM

Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253

Hey firefox, let me just say this. GO TO CORNELL DUBILIER!!!! I just ordered 40!! 942C16P68K capacitors. They have a value of more than 3 times the .15uf one. They are .68uf and 1600vdc!!!! Ok the .15uf 2kvdc caps cost 100 bucks for 24... Amagine how much 40 of THESE things would cost!!

Oh yea i forgot to say the rsg i made, if running at 3000rpm, is good to 400bps. in an ac coil you usually use 120bps. That means this is good for resonant charging because with resonant charging it is quite high current and an underrated capacitor so high bps is good so you can get optimum performance.

Btw so what if he is young, i was 10 when i got my first mot and i am fine(has a heart attack) maybe not.

teslacoolguy

Thu May 29 2008, 04:09AM

Registered Member #1107 Joined: Thu Nov 08 2007, 10:09PM
Location:
Posts: 792

I got my first mot when i was 10 also. About the rsg i am actually making something very similar to what arcstarter is telling you about. It is a 24v scooter motor hooked up to a pwm dc motor controller and because i have a lathe i made a nice plexi disk that has 8 electrodes and i can go up to 200+bps using that.

Weston

Thu May 29 2008, 09:50PM

Registered Member #1316 Joined: Thu Feb 14 2008, 03:35AM
Location: Cambridge, MA
Posts: 365

Firefox is 10

? dang i guess he is younger than me (i am 12)

Firefox

Thu May 29 2008, 10:37PM

Registered Member #1389 Joined: Thu Mar 13 2008, 12:50AM
Location: Pittsburgh, PA
Posts: 346

I'm not ten, man. I'm graduating in a week here! Heh heh. I'm just cheap, but maybe thats cause I'm poor.

Arcstarter

Fri May 30 2008, 12:25AM

Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253

Weston wrote ...

Firefox is 10

? dang i guess he is younger than me (i am 12)

I was not suggesting he was ten. I was just saying i was really young.

Well i don't know if you have given up on the whole mot powered tesla coil or not but if you can get 6 mots you can make on heck of a tesla coil. Just connect two mots together for power supply, along with a voltage doubler using 4 of the capacitors hooked together so you have 4kv at 1uf. Use one diode in the doubler. Then on the output of the mot just hook 4 mots together as a choke. After the choke use the rest of the diodes you have in series so that you have a diode chain to keep high voltage spikes from getting into the supply. then that should go to a capacitor of around 30 to 40 nanofarads and a rsg to discharge. Check these coils out to see what it can really do!

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