AC from Joule Thief Secondary/pick-up

[jeanna]

Good,

I was first going to ask you how many turns you have on the primary bifilar?

But, I have a few that work and since they are the same medium 5/$1 I will assume you will be successful with the kind of numbers I used.

I believe that if you have between 6T and 7T but more like 6T on both sides of the bifilar, you will get some good results.
I have one marked that it has about 450 ohm at the base resistor and one also has a 103 cap across the legs of the base resistor.

Why don't you go straight to those numbers and see how it goes for you. You might not need the cap at all, or maybe that is all you need. Just try a few things to see.

Then let me know the next question.

jeanna

[nievesoliveras]

Good,

I was first going to ask you how many turns you have on the primary bifilar?

But, I have a few that work and since they are the same medium 5/$1 I will assume you will be successful with the kind of numbers I used.

I believe that if you have between 6T and 7T but more like 6T on both sides of the bifilar, you will get some good results.
I have one marked that it has about 450 ohm at the base resistor and one also has a 103 cap across the legs of the base resistor.

Why don't you go straight to those numbers and see how it goes for you. You might not need the cap at all, or maybe that is all you need. Just try a few things to see.

Then let me know the next question.

jeanna

Thank you @jeanna !

I have 2b-10c-70p. I need to make a new one for the test.
I will do the tests during the day and will let you know.

Jesus

[Bubba1]

...I have trouble getting the solder to stick, these days.
I never used to have this problem, but I do now. A lot....

Jeanna:

Are you using rosin core solder and are you wiping the tip of the soldering iron on maybe a damp sponge?

[jeanna]

Jeanna:

Are you using rosin core solder and are you wiping the tip of the soldering iron on maybe a damp sponge?

I am, but sometimes the tip cools before I get it to the sponge. Is that all the reason for the problem I am having?
That sure is an easy fix if it is.

Thank you,

jeanna

[nievesoliveras]

@jeanna

I did some tests with a toroid already done I had. I t is 2b-8c.
It lights a yellow led brightly.

I added only one turn and try the two leds inseries. Nothing.
I changed the wire and wound 6 turns and try again the two leds and nothing I took one out and checked and nothing.

The breadboard is the same one I am using for a flyback coil test.

I dont want to break the toroid wires and make another, because I cannot be wasting the wires I have. If I pull out the cable it will get all twiched and it will not look good when I put it back.

Jesus