Joule Thief

[jeanna]

@jeanna
the first jt pickup coils is ala mk way ?
i am asking because, if it is, then the red + and - does not really have a meanning since it output an ac signal.

This one is not a an MK design. It has the name "zebrak", meaning zebrawithkynar. It is the one I jammed as many turns of 30 gauge kynar through. I remember 74 turns on this secondary.... I am building up to the mk series. I want to understand the circuit part of this first using the "ordinary jtc with secondary".

I think you are correct.
The + and - have little to no meaning. BUT, it would make this schematic too hard to understand without using the usual + and - for reference.
And, I put the leads off that first tier secondary into the + and - battery rail.
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EDIT:
I changed the color, too. I didn't realize it was still red until you mentioned it.
--
This is the differentiation place between the one + side of that first tier toroid and the - side. (This is what I want to absolutely confirm in a bit.)

The wave of this looks like tak's picture. (great pic tak22), although some of the waves go on the other polarity, most of them are on just one side.

There is a difference shown by the scope when I put the probes on what I called the + side (1.2v) and what I called the - side. (6.4v) It is a significant difference for something that is a continuous wire at that place.

I need to recheck to be absolutely sure where this so called pos and neg switch occurs. My guess is at one of the toroids, but I will say exactly in a bit. (that is, if I can )

thank you,

jeanna

[jeanna]

OK one more try for clarity.

This is a color coded schematic. I had to sort of return to the original "drawing" style to get the secondary more clear.
I also added a faint echo of the transistor and its base resistor that are now removed. I showed with colors what place a wire would have been connected in the original design...I hope.

here goes.

Let me know if it is still unclear.

thanks,

jeanna

[TheNOP]

Let me know if it is still unclear.

it is clear.

what is unclear, to me, is what you are trying to achive.

don't let this disturb you tho.
i do not want to discourage you from doing whatever you want to do.

[Artic_Knight]

jeez you guys have really been moving along with this! has anyone by chance tried a bifiliar coil similiar to the one used by tesla? tesla states that the specific design of his bifiliar coil had a "high frequency and capacitance" property going for it, supposedly it "gained" power during use.  his coil used 2 seperate wires placed side by side and wound in the diagrams as a pancake coil but i think it merely used the pancake design to iliustrate the unique pattern it had.  simply put take 2 wires side by side and wind them 10 turns around a torrid now connect the end wire of one of the coils to the beginning wire of the other so that each coil essentially travels the same direction down the torried then back to beginning to do it again   i will be testing this myself soon.

[Mk1]

@Artic_Knight

i believe my cross winding coil is exactly that.
since you need to connect them you could also do it with one wire.

Mark

But thank for your input , it a good info.

Edit , the previous statement is not good there is a difference between the pancake and the cross winding , but i know now how to make a pancake coil pickup coil with one wire one the jt, i will test and post the steps.

Thank again Artic_Knight