Joule Thief

[stprue]

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.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.



jeanna

My DDM reads frequency.

I was thinking about the caps messing with it but they are on the first voltage input and not where I'm making my reading.  I will try taking them off.  I also want to try charging the maxcaps in parellel and have the out put in series to the jt. 

I didn't know that connecting the secondary back to the source it would kill your transistor!

[innovation_station]

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...

lol

yea i got bored with that last unit ...  i could use it as a power supply for a shift coil runnnn slowly with 2 freqs ....  but bahhhhhhhh

i built 

you all a ramped up jt pump coil     lets call it a tpu....  thanks aluka!! 

ist!

better check it out ..... 

http://www.overunity.com/index.php?topic=7612.310

[jeanna]

My DDM reads frequency.

cool.

I didn't know that connecting the secondary back to the source it would kill your transistor!

Well, not just cuz it is your secondary, but when you rectify your secondary and get 84 volts you better not use that as the source into your transistor. I spoze if your resistor is hi value enough, but then why bother?

I could be wrong. I just thought it was a bad idea. I mean when you collect 84 volts into a cap after 10 seconds from a full bridge then you short it, what happens?

I was thinking about the caps messing with it but they are on the first voltage input...

Oh, I see. No, they should do almost nothing there. They help if the power dips, I think. they are what made the difference in 1 hour in the time on the tube. But they never show up on any meters. AFAIK


jeanna

ok ist I will check it out now.!

[xee2]

@ stprue

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!

When I increased the pickup coil turns on the 3.38" toroid from 20 to 80 the frequency and output voltage each doubled.

[stprue]

@ stprue

When I increased the pickup coil turns on the 3.38" toroid from 20 to 80 the frequency and output voltage each doubled.

If you fill up the entire coil, let me know if you can get a frequency reading.  I still think my error may be the maxcaps!