Joule Thief

[stprue]

@Jeanna

I'm sure you know this but have you taken frequency measurements with the secondaries rectifien and then put in series or attach it to itself like tesla says.  When it is in series with itself the frequency goes up approximately 75%.

Edit:  I also noticed that voltage goes down but a connected led will get brighter.

[Cap-Z-ro]

Jeanna...from here it looks like you are going to end up with the same device as that Russian inventor in the video they are studying on that other hot thread.

Regards...

[jeanna]

@Jeanna

I'm sure you know this but have you taken frequency measurements with the secondaries rectified and then put in series or attach it to itself like tesla says.  When it is in series with itself the frequency goes up approximately 75%.

Where is that quote? I would love to read this.

No, I haven't.

If I were to rectify the secondary and feed it back in, I would blow the transistor.

But I am looking at 111KHz and 209KHz. I have seen over 1Mhz just by using a joule thief!!

As to taking frequency measurements from the rectified secondary, I found that the frequency of the basic joule thief determined the frequency of the secondary.

So, at the moment, I have
basic joule thief in resonance. tor-23;
2 secondaries pulsing at the same frequency, each one being a separate circuit lighting leds at a different rate.
One is 84v, the other is at 37v, but that is without the resistor at the battery.
At 205KHz
There is a lot to play with just to be able to see what happens.
I must use a resistor at the battery because otherwise it  hurts my eyes the leds are so bright.


With the biggo, I had it in mind to get a good high frequency then tune it down to get a high voltage.

It is in fact what eventually happened.

It started at 90v per direction of the MK1 but when I was finished the volts were 70 v.
The frequency was high though, (not sure how much, I can look it up if needed.)
I tuned it by reducing the resistor at the base of the transistor, and the volts climbed up to 450v and the frequency dropped but was still 5.6KHz.

5.6 is still in the high frequency range and I am still getting the benefit of the high frequency. (by lighting a tube.)

ooo it is too hot for my computer.

jeanna

[stprue]

Where is that quote? I would love to read this.

No, I haven't.

If I were to rectify the secondary and feed it back in, I would blow the transistor.

But I am looking at 111KHz and 209KHz. I have seen over 1MHz just by using a joule thief!!

As to taking frequency measurements from the rectified secondary, I found that the frequency of the basic joule thief determined the frequency of the secondary.

So, at the moment, I have
basic joule thief in resonance. tor-23;
2 secondaries pulsing at the same frequency, each one being a separate circuit lighting leds at a different rate.
One is 84v, the other is at 37v, but that is without the resistor at the battery.
At 205KHz
There is a lot to play with just to be able to see what happens.
I must use a resistor at the battery because otherwise it  hurts my eyes the leds are so bright.


With the biggo, I had it in mind to get a good high frequency then tune it down to get a high voltage.

It is in fact what eventually happened.

It started at 90v per direction of the MK1 but when I was finished the volts were 70 v.
The frequency was high though, (not sure how much, I can look it up if needed.)
I tuned it by reducing the resistor at the base of the transistor, and the volts climbed up to 450v and the frequency dropped but was still 5.6KHz.

5.6 is still in the high frequency range and I am still getting the benefit of the high frequency. (by lighting a tube.)

ooo it is too hot for my computer.

jeanna

That's strange I think my recent MK coil is exactly 5.6khz but when you put the secondaries in series with each other it goes up to like 15 point something khz's I had an led in at the same time and at 15khz the voltage was lower but the led was brighter and vise verse.  I noticed this today messing with my ddm..

Maybe you can ansewer this...I can't get a frequency reading on the biggo!!! I was thinking it might have something to do with the maxcaps I'm using but I haven't tried taking them off yet!

[jeanna]

... but when you put the secondaries in series with each other....

Hi stprue,

I can't say anything about frequency readings without a scope.
Or, did you get that one you were wanting?

When I take volts and frequency measurements I am only taking them from the secondary. (I forget to say that, I apologize.)
I don't know where you are reading your frequency on your primary, so I need you to tell me that before I can compare it.
I have seen that when you raise the frequency you will lower the voltage. There are exceptions to this, but they are when adding other components or elements.. When the only thing that changes is the frequency the volts goes the other way.


That said, have you tried to follow what I have been showing next door?
All the secondaries are separately wound on the same toroid  in that circuit. And the frequency is the same... It makes sense.

It also is so that when I connected them together, they were the same. But that may have a different reason. I used a tor-23 inductor to make all the lights stay on, and maybe that was a fortuitous discovery. I dunno.
I realized that when I connected them together, the wire they had in common, was the 'ground' and they were not really in series, maybe.

but they work both ways... separately or connected together with this common ground wire.

But...
You will not see these results if you make your circuit into a dc one. in a dc circuit the battery is the ground. The negative side of the collection cap will work as the ground, I think.

...something to do with the maxcaps I'm using but I haven't tried taking them off yet!

I should think you would not be able to get a frequency reading with maxicaps, but I am not knowledgeable about caps. It seems to me the cap would absorb the pulses. I think if you want to see the frequency and it is fast, you must have small value caps... but I don't know how small. sorry.

I hope this makes some sense.

@cap-z-ro

I just realized you might think I am ignoring you again!

I am not sure.
I am not making dc out of anything. I found it disappointing that the russian inventor is making dc. The thickness of the wires was a good hint.

What I am continuing to do, is find out how this ac thing works.

We have been given a very small part of ac info... only what fits into a dc circuit diagram.
I am switching to the ac diagram that tesla used. It is the only way to express what happens.
Notice, how the circuit trails off to the right. It really never has to end.

AND THAT IS REALLY SIGNIFICANT

But not too many experimenters here want to play in this sandbox. There is no resource except Tesla, and his writings need to be studied, not read. Also, for our purposes the writings are all over the place, because he was trying to convince the world that radio and telecommunications and lightbulbs in all houses were possible.

But no one has explored his real ideas.

This russian inventor is doing it, but instead of using commercial ac he is using dc. I wonder if "Georgia power and light" is dc?

Oh well, but it is really close. In fact, it may be exactly the same with the dc conversion as shown in the picture I posted earlier.

I need help tuning capacitors to inductors.

Do you know how to go about doing that?

thanks,

jeanna