Joule Thief

[Artic_Knight]

jenna

i would say the high frequency is best as far as my goals are concerned. that would put the large coil on base then im assuming?

with the circuit commonly used to light a florecent on this forum the high frequency would be fine. the high frequency generated by the joule thief would remain high frequency when being stepped up in a secondary transformer. 

if you will reference the tesla patent on high frequency generator that i posted he does this very thing, altho he does have to use a medium of sorts to produce the frequency just as we use the joule thief he then takes that frequency and runs this through a tesla coil of sorts. as a matter of fact one could say he simply had in that patent a high frequency tesla coil as the secondary step up transformer could have its secondary winding grounded and the other suspended in air to produce the same results.

thats all a tesla coil is, a circuit to control the flow and a step up transformer that has one end of a secondary winding grounded with the other being a aerial. 

one of the many experiments i plan to test is a joule thief powering a second step up transformer utilized as a tesla coil just to see the difference from a regular tesla coil. my prediction is we will get more sparks and less noise!

a unique fact of high frequency current that i think has been stated before is that the thin wires are all thats necessary to transport it as it travels on the outside of the wire. also since it travels on the outside of the wire i anticipate less resistance.

something to note there is a magnetic device of sorts that came between the vacuum tube and transistor. its not well noted but its a magnetic amplifier. they saturate the core with dc and introduce ac once the core has been saturated and this keeps losses down to about 0. interesting fact. with that circuit in mind it shows that a saturated core is a happy core.

[Pirate88179]

ArticKnight and Jeanna:

I just got my electronics goldmine "Specials" pages in the mail today and i see they have trigger coils at a very low price. (300+ volts)  Since I am a long time fan of the Fuji circuit I was wondering if, as Fuji did, we could use the trigger coil after our JT base coil, which would replace the transformer in that circuit.  My goal also, now, is to light some tubes from my earth battery and all I need are volts to do so.  I may get some of these (less than $1 ea.) and give it a go.  My uneducated guess is that, depending what is fed into them will reflect in the out put.  What do you guys (no offense Jeanna) think?

Bill

[jeanna]

I just got my electronics goldmine "Specials" pages in the mail today and i see they have trigger coils at a very low price. (300+ volts)  Since I am a long time fan of the Fuji circuit I was wondering if, as Fuji did, we could use the trigger coil after our JT base coil...
What do you guys ... think?

Bill

Give it a try.
I need to look it up to see how a trigger coil works. It sounds good to me 300volts. And it isn't just a coil or transformer with a high secondary count? It would certainly be convenient to be able to buy those things.

From the goldmine, I bought 3/$1 high voltage board that was intended for a camera circuit. It is just a designer's circuit, I guess... It has a neon and silver cap transistor and relay and the nice transformer. I have put off using, however, because I ... um, well, I am just that way.

I think you will be able to run a fluoro from the fuji ckt in your front yard, actually.

jeanna

[Pirate88179]

@ Jeanna:

I have tried the Fuji circuit on the EB 2 times now and.....nothing.  I don't think I have high enough mA's to fire that circuit.  Remember, that has a pretty good size transformer before the trigger coil.  That is what is leading me to think of this possible alternative method.  The trigger coil is so small ( you have seen them) that I think it would take not a lot to get them working and, since you guys are already getting some good juice out of the JT I thought this might be a good match.

But, you are correct, only one way to know and that is to try it.  Try it I will.  Thanks.

Bill

[jeanna]

@ Jeanna:

I have tried the Fuji circuit on the EB 2 times now and.....nothing. ...

But, you are correct, only one way to know and that is to try it.  Try it I will.  Thanks.

Bill

I am wondering about the cap you have in the battery rail. I remember it was that supercap in parallel with your led that was the first to light last year.
Maybe all you need for the fuji to start is the cap??

Remember xee said yesterday the fluoro tube won't light without the diode and cap by the light. I kindof remember the one that lights but dimly had no cap at the battery rail. He said, I think, the cap in the rail took more juice from the battery but the light was stable and bright. Without the battery rail cap it would light but was dim. Without the rail cap the amps draw was lower too, so it all makes sense.

jeanna