Joule Thief

[xee2]

Well this doesn't make sense. My test results go the opposite way from jeanna's.

[Mk1]

@xee

I see one or two problems with your data . First the diode limit is 1000v after that they are unreliable .

Second , you use fix resistor value , i usually use a pot to find the highest voltage or current depending on the test .

So if i change anything , i re tune it , the battery goes down same thing.

Those are my observation .

Mark


@jeanna

What is the wire size you use on the jt tested.

Same question for Xee

[jeanna]

@jeanna

What is the wire size you use on the jt tested.

On the
big Gold
2T,7-10T
That wire was 24 awg

The 330T of gold was 26awg which I bought from gobrushless.
It is the same size as the green wire from RS.
======

@xee2,
You are right that is very strange.
I bet it is the transistor.
I remember you told me to look to the transistor once and last week I had a few different kinds of transistors and just changed nothing but that element and the difference was hundreds of volts and thousands of hz,
the transistors were:
2N3904
TIP31
TIP31C
TIP3055

The little one was the low one.
It also used many fewer mA
Which is why I think the transistor is what is determining the amps draw, and not the wires.

So, if there is no other way to read your output but through a diode cap arrangement you will be limited in your test results.
You may have the results but not be able to show it.
I wonder how well the cfl goes on when you have the 2T6T which I never even tried to scope.

thank you,

RS had another TIP31 and TIP3055. I bought both.
My volts are up from 39v to 111v on the new transistor, but the other day this gave me 350v and I cannot believe my eyes. 

jeanna

[xee2]

@ Mk1

@xee

I see one or two problems with your data . First the diode limit is 1000v after that they are unreliable .

Second , you use fix resistor value , i usually use a pot to find the highest voltage or current depending on the test .

So if i change anything , i re tune it , the battery goes down same thing.

Those are my observation .

Mark


@jeanna

What is the wire size you use on the jt tested.

Same question for Xee

All wire is #26. There are actually 2 diodes in series.

[Mk1]

@ Mk1

All wire is #26. There are actually 2 diodes in series.

thank for the clarification , There is still the fix resistor value i wonder about jeanna?

Also i have to say i don't like 26 on the jt side , i always use 22 it works so much better , i don't know it its the size or insulation making a space between the wire and the toroid .

Mark