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Hello everyone,
I wanted to post a few notes on making a self runner. there are several things that will help you achieve this.
this is a vanilla SG circuit, attraction mode, 8+1 coil, standard Teslagenx 8 transistor board with MJL 21194 on a Telsagenx 3 coil wood kit, 26 inch bike rim on sealed bearings, running 1 coil. with large cap dump comparator.
1- a cap dump is necessary, Johns earlier machines all had cap dumps that were mechanically commutated. you can see this with some of the machines that had pulleys and mechanical brush and commutator setups. his best machine had 3 1 Farad caps in parallel. think about how low that impedance is!!
2- a Capacitor on the front end in parallel with the primary, 60 to 80 volt cap minimum, as many uF as you can afford, big wires on the front end.
3- BIG WIRE going to and from the batteries. even a small machine benefits. I have seen huge gains just going from 16 gauge to 6 gauge on a single coil SG. with some cap dump setups the difference is up to 40 amps on the pulse coming out of the Capacitor.
4- many batteries on the back end in parallel, the lower the impedance the more charge you will get from the cap dump. 6 on the back will allow you to swap a battery front to back and have 5 more to do other things with. batteries should be matched sets.
5- run at 24 volts on the front end, charge at 12 volts on the back end.... the differential helps the spike put even more juice into the cap faster, at lower amp draw.
6- a "tiny tiny tiny" neo on the back of a single stack magnet rotor will help focus the magnetic stream farther down the coil, this may or may not help, give it a try, it has helped on one of my setups.
7 - use 16 magnets on the rotor, this is a trick John told me about, it relates to the coral castle and Ed Leedskalnins work. not sure what difference it makes, but it seems to allow for good spacing for the imaginary south between the magnets.
one more thing on cap dumps, when John was first designing the large cap dump, I was at the shop, and I asked him how many caps we could put on the comparator in parallel before we saw a difference in the dump frequency. we started with 4 15000 uf caps, and set the frequency to about once per second, we then added 2 more at a time until the dump frequency changed noticeably. It was not until we got 10 15000 uF caps on the comparator that the dump frequency changed. so from 60,000 uf to 150,000 uf to cause a change in the dump frequency. this is simply to show that the radian enters in huge amounts into the capacitor, and the bigger the cap the more gets harvested.
let me know if any of you try this, most of you already have all of this in your arsenal.
Tom C
I wanted to post a few notes on making a self runner. there are several things that will help you achieve this.
this is a vanilla SG circuit, attraction mode, 8+1 coil, standard Teslagenx 8 transistor board with MJL 21194 on a Telsagenx 3 coil wood kit, 26 inch bike rim on sealed bearings, running 1 coil. with large cap dump comparator.
1- a cap dump is necessary, Johns earlier machines all had cap dumps that were mechanically commutated. you can see this with some of the machines that had pulleys and mechanical brush and commutator setups. his best machine had 3 1 Farad caps in parallel. think about how low that impedance is!!
2- a Capacitor on the front end in parallel with the primary, 60 to 80 volt cap minimum, as many uF as you can afford, big wires on the front end.
3- BIG WIRE going to and from the batteries. even a small machine benefits. I have seen huge gains just going from 16 gauge to 6 gauge on a single coil SG. with some cap dump setups the difference is up to 40 amps on the pulse coming out of the Capacitor.
4- many batteries on the back end in parallel, the lower the impedance the more charge you will get from the cap dump. 6 on the back will allow you to swap a battery front to back and have 5 more to do other things with. batteries should be matched sets.
5- run at 24 volts on the front end, charge at 12 volts on the back end.... the differential helps the spike put even more juice into the cap faster, at lower amp draw.
6- a "tiny tiny tiny" neo on the back of a single stack magnet rotor will help focus the magnetic stream farther down the coil, this may or may not help, give it a try, it has helped on one of my setups.
7 - use 16 magnets on the rotor, this is a trick John told me about, it relates to the coral castle and Ed Leedskalnins work. not sure what difference it makes, but it seems to allow for good spacing for the imaginary south between the magnets.
one more thing on cap dumps, when John was first designing the large cap dump, I was at the shop, and I asked him how many caps we could put on the comparator in parallel before we saw a difference in the dump frequency. we started with 4 15000 uf caps, and set the frequency to about once per second, we then added 2 more at a time until the dump frequency changed noticeably. It was not until we got 10 15000 uF caps on the comparator that the dump frequency changed. so from 60,000 uf to 150,000 uf to cause a change in the dump frequency. this is simply to show that the radian enters in huge amounts into the capacitor, and the bigger the cap the more gets harvested.
let me know if any of you try this, most of you already have all of this in your arsenal.
Tom C
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