Ultracaps tested for excess energy

[MileHigh]

Albert:

In the 1000+ pages of the JT threads, did anyone ever run a test where they compared the running frequency of the JT while changing the number of turns of wire on each of the coils?  I would not be surprised if the test has been done, but I would also not be surprised if this test was not done.

I tried to find a good link for you about this but I could not.

Don't confuse the mechanical resonating frequency of the toroid with any electrical resonance, they are two different beasts.

Since I could not find a link for you, let's discuss the transistor ON time and OF time, because that defines the running frequency of the JT.

1.  Transistor ON time

When the transistor switches on, it starts energizing the drive coil, and then it switches off after the drive coil is nearly fully energized.  The larger the inductance of the drive coil, the longer it will take to fully energize the inductor.  Therefore, larger drive coil inductance equals lower JT frequency.

2.  Transistor OFF time

When the transistor switches off, current starts to flow through the trigger coil.  Eventually enough current is flowing through the transistor base input to switch on the transistor.  The moment this happens the transistor "snaps" on fully.

The larger the inductance of the trigger coil, the longer it will take to reach the point where there is enough base current going through the transistor initiate the "snap on" of the transistor.  Therefore, larger trigger coil inductance equals lower JT frequency.

So, how do you calculate the inductance of a coil of wire wrapped around a toroidal core?

Here is the link:

http://hyperphysics.phy-astr.gsu.edu/Hbase/magnetic/indtor.html

You can see that the inductance of the coil is dependent on the size and shape of the toroid and its magnetic permeability.  Most importantly, you can see that the inductance is proportional to the square of the number of turns of wire wrapped around the toroid.

Therefore, the more turns that you wind for the trigger and the firing coils of your JT, the lower the resonant frequency of the JT.   Certainly the dimensions and permeability of the toroid itself affect the resonant frequency.

So, the most important thing to remember here is that the toroid itself does not have a natural electrical resonating frequency, but it plays a part in determining the natural electrical resonating frequency of the system as a whole.  Changing the number of turns of wire in the trigger and firing coils will change the natural electrical resonating frequency of the JT.

Notice that link is from the "hyperphysics" series, which has a great wealth of information for experimenters.  It is worth it to "drill up to the top level" from the above link to check out the site.

In my searching, I found a great technical JT link with scope shots and Spice simulations for those that are interested:

http://www.prc68.com/I/JouleThief.shtml

MileHigh

[MileHigh]

Albert:

you have never heard a toroid or led sing . As can the wires and transistor sing as well . no kidding .

I believe you.  The real question is why do they sing?

MileHigh

[innovation_station]

MH

things must apply diffrently to air core ...

anyhow i wound my w core ...

here ya go this will piss fire ...  trigger 6"  pulse 24"  collector 18' 12gage solid  good for 600vac or dc
40 amp plus!  wire rateing ...   

w

[gadgetmall]

Nice Ist . i know it will piss fire . Use a good transistor better than 2n3055 . I bet a darlington 121 will make it go above 1000



Mh . O yes we are well aware of tuning a primary to a certain toroid . Jeanna and mark have gone into full details with volts  per turn .etc.. The toroid we are working on now is 3 38 inch and tuned with two  turns on the base and 10 on the collector  and 80 turns on the secondary light a cfl bulb with a one volt battery and a tip 3055 . That one ist has i blew 5 transistors last night and 4 leds . I only have 6 turn primary 2 wires wound togetehr  and a 7 turn secondary and it light 20 leds off the secondary and one from the b c on the transistor and another off the c e junction on the transistor .. Its a powerful core ! The most powerful i ever saw and it sings loud everywhere and everything on it sings .. I have high frequency hearing loss and i hear it good .
Albert . Check outthe last 4 pages on the second stage Jt circuits section

We are well aware of resonanate inductance and how to tell if a core is anygood or not . The bad one wount work no matter how many turns you wind // Thanks for the link. Interesting i like the current checker on each transistor idea .

[innovation_station]

Nice Ist . i know it will piss fire . Use a good transistor better than 2n3055 . I bet a darlington 121 will make it go above 1000



Mh . O yes we are well aware of tuning a primary to a certain toroid . Jeanna and mark have gone into full details with volts  per turn .etc.. The toroid we are working on now is 3 38 inch and tuned with two  turns on the base and 10 on the collector  and 80 turns on the secondary light a cfl bulb with a one volt battery and a tip 3055 . That one ist has i blew 5 transistors last night and 4 leds . I only have 6 turn primary 2 wires wound togetehr  and a 7 turn secondary and it light 20 leds off the secondary and one from the b c on the transistor and another off the c e junction on the transistor .. Its a powerful core ! The most powerful i ever saw and it sings loud everywhere and everything on it sings .. I have high frequency hearing loss and i hear it good .
Albert . Check outthe last 4 pages on the second stage Jt circuits section

We are well aware of resonanate inductance and how to tell if a core is anygood or not . The bad one wount work no matter how many turns you wind // Thanks for the link. Interesting i like the current checker on each transistor idea .

thanks bro

i was thinking something else i may try : ) : )

lol

and im sure you know what i mean ...  none the less i can fire it like a jt ... like a tpu .. or a magnifing amp ...

if i use mosfets ... i loose the trigger wire an FORCE FEED AT THE FREQ OF MY CHOISE

with a 4401 npn ...  im way off myscope ...  20mhz...   i call this VHF...  it will charge caps fast ...


any how on with it ... 

i wish i only had to learn basic tesla ... and simple coils ... but this journy goes light years beond that !

EYES ON THE SKYS ...  u will see much more !

w815H

b day aint far away ......   look to the sky!  upon this day!   i have herd .. sights shall be seen far and wide in the day time sky !