AC from Joule Thief Secondary/pick-up

[xee2]

@ jeanna

I suspect something is wrong with your frequency measurements. If all of the coils are being driven (either directly or indirectly) from the same transistor, then they will all have the same frequency.

[jeanna]

@ jeanna

I suspect something is wrong with your frequency measurements. If all of the coils are being driven (either directly or indirectly) from the same transistor, then they will all have the same frequency.

I think it is more complicated than that when you interject another inductor in only one segment / or a different one in each segment.

Mostly they are the same. 208KHz.
But some are not.
Some may indeed be incorrect, but only because the wave goes crazy and becomes unreadable. (resonance??)

But, with different inductors they should change , and if I find the right capacitor to run parallel with each inductor, I think it could do something interesting.

They are being driven by the pulses of the bjt which sets up the rising and collapsing field of each inductor. I will look closely today, unless it gets too hot again. (mid-nineties yesterday)
I think this is really interesting and I want to pursue it.

I know there is a calculator page from a radio guy somewhere that helps calculate number of turns and thickness of wire and length etc, to inductance. If I remember, he also has a capacitance element to calculate later. I have the link somewhere...  .

thank you xee2,

jeanna

[Pirate88179]

Jeanna:

Here is a coil calculator page from a while back:

http://deepfriedneon.com/tesla_frame6.html

It also has many other handy calculators there as well.

Bill

[jeanna]

Thanks bill,

I thought that was it, but it is not. This neon site starts with most of the components we don't use, like mains power etc.

edit
I found what I need.

I plunked in .38inch and 208khz and 26 gauge wire
I am wanting to find resonance with 208kHz because That is what I have. It is coming up in many readings from the other secondary.
I think it is where to start making each segment or what comes off of each secondary powerful

This may be its most powerful place.
I will see.
I have everything I just need to wind it.

This is what the calculator tells mw for a radio receiver that is cylindrical in form...

The frequency is 208000 Hertz (or 208 kiloHertz) (or 0.208 megaHertz)

The capacitance is 100000 picoFarads(or 0.1 microFarads)

The inductance of the coil is 5.855 microHenrys

The coil will have 35.414 turns
and will be 0.6 inches long (you will need 5 feet of wire)

Here is where he is:
http://sci-toys.com/scitoys/scitoys/radio/xtal.html

thank you,

jeanna

[jeanna]

I wrote this on 2 different days. I hope it makes sense.
2 pics of text with table
2 pics of the circuit
jeanna