Joule Thief

[Mk1]

@jeanna

Sorry if Gary answer is enough for you , but i assumed you did connect them in phase , when you connected them in series, and like i said there are 4 ways to connect 2 coils in series , 2 of them will lower the voltage since they are not in phase , but even more so in the mk style pickup coil since the each have 2 phase , so testing all 4 different way , and did not get one of those to get a higher voltage then one coil . Sorry , there is more to it , Gary by design , the design of the coil make if real hard to connect the coil in phase. This is not the same here.


Mark

Btw , the magic about the way a wind my pickup coil permits it to light led in both direction , but the phase are not the same , if you did not have up down pickup coil .


But honestly tell me have you ever tried tuning the way i described it page 478, if not cool by me be tell me why ?

[resonanceman]

I think there is more to the parallel thing. I may start the ac joule thief thread soon. I want to explore all this jt and secondary/pickups in parallel circuits and maybe more, and see where it can go.

Jeanna

I am sure  you can find  ways to make them add up right .

The  question  I would have to ask  is    if  you get them  to add up right .......when the   frequency changes   do they still add up  right ?


gary

[jeanna]

I know if I connect in series, any 1.2v or 1.5v, or 12v batteries, I can raise the voltage of the battery set.

Has anyone got any knowledge on how to do the same using a EB?
To my way of thinking it should be [possible, but has anyone ever done/achieved this?

jim

If the earth is a non directional current, and it is, then you will not be able to use the eb as you would a direct current battery.

How would you add up a bunch of alternating current sources to achieve more power. That is the key to your answer.


jeanna

[Mk1]

@all

And Jeanna

This is what a was talking about in design consideration .
Concerning attraction and repulsion mode .

[jeanna]

Jeanna

I am sure  you can find  ways to make them add up right .

The  question  I would have to ask  is    if  you get them  to add up right .......when the   frequency changes   do they still add up  right ?


gary

good question.
-----
First to get this out of the way, I will describe what I connected to what.
Let us say there are 4 wire ends to this 2 sided pickup.
A,B are on one side and C and D are on the other.
I can connect and measure with the scope across
AC,
AD,
BC,
BD

2 of these reduced the voltage by over half and the other 2 by 88 percent. These are big losses.

So, with that out of the way, here is the resolution.

This biggo toroid which comes from allelectronics and is inexpensive, as things go, needs to have the base coil have 13 or 14 turns while the collector coil cannot really do with more than 4. I will need to make a new primary to add more to the collector coil, to be absolutely sure,  but it is interesting for another reason.

It shuts OFF when the base resistance is less than a certain amount like 50 ohm or 79ohm. This figure changed with the number of turns and is not an absolute.

But these 2 items are completely opposite what other toroids have done.

This may give me the clue I need to get the cws high flux toroids to oscillate.

It is funny how things happen in batches (quantum effect to be sure  )
today, I ran a non galvanic stubblefield generator I made last year, as the core and coils of a joule thief. (see the pics posted above) to test it with a scope and the jt circuit and it ALSO, had a bottom amount below which it stopped oscillating.

I just happened to have a 2k2ohm resistor in the base resistor spot. The light went right on. cool.... Now, The lowest resistor that could work with it today was (I think) around 50 ohms. This would change with a different transistor etc.

...But the point here is that this is very different from most of the toroids I, at least, have worked with.

jeanna