Joule Thief

[jeanna]

First...
Thank you xee2.
I have a hard time with it being a w because that is a high permeability, but mine was doing well at 2.27khz which was yesterday's video, and as your table tells, that IS high permeability...

It is strange this conflict in assertions of permeability between you and MK1. You both have good reasons, and you both have results, based on your reasons.

Maybe the permeability doesn't matter as much as the transistor. See below.

@MK1
Thank you for reposting that. It is a good method. Did you also post it on the 101 thread for beginners?

@All,
I made some tests today.
[I knew I had a strange 2N3055. It was reversed from the beginning. The higher number of turns should be on the collector coil but on this my first hand wound fluoro tube lighting circuit, it was reversed.

I must have very funny component karma. ]

So, the other day I bought a TIP3055 from radio shack.
It was this that I used yesterday to light the cfl for my first time and achieved 895v at 2.27khz frequency.

I re-tried the core with the red 240T from last spring but before even starting, I made the turns 2T,10T like yesterday's

It lit the cfl immediately with 240T, so I knew it was the transistor at fault for the struggle last spring.

Then I began to tune the 240T core. I reduced from 10 to 9,8,7, and at 6T the voltage on the red 240T was 1040volts !!!!!!!

So, then I went back to the gold one which has over 300T and again I reduced the collector turns from 10 to 9. The volts went to 1439v.
This could harm my scope, so I put it away, and I reduced the collector coil turns to 8 then 7 and tried to light things.
The cfl doesn't stop flickering. I may need to solder this, because at this kind of volts there is bound to be sparklers. I can feel the tingle when my hand touches a probe directly.
At 7T and  6T, I tried to light that big 48" tube. It didn't light, but  both ENDS lit up immediately and, it got to about 12 inches from the one side with the help of my hand and the magnet trick. Nothing got it to light. This is 36w and will probably light when I have 1900v-2000v
A 105 cap at the base seems to be the best frequency for the resistor resonance.

I will try out the open office spreadsheet and make a table of this for you.
I was in a happy hurry, but I will return.

jeanna

[innovation_station]

yikes

we cant just rise ...  WE GOT TO SHINE TOOO 

i see a bright light shineing ...   

awesome! 

w 

1439V  OMG!  wow    somthing tells me they are gonna charge super fast those caps ..

[Pirate88179]

Jeanna:

I remember when you said, not too long ago I might add, that you wanted to hand wind a toroid that would equal or better the legendary Fuji circuit.

Well, at 1439 volts, I do believe you have beat it with a stick!!!!!!!!!!

Let's see, Fuji...about 350 volts or so.....

Jeanna's coil...1439 volts.

Yes, I would say that you have exceeded your goal, ha ha.  Very nice work there Jeanna!  I will drink a toast to your success when I go off surveillance duty later this evening.

Bill

[Mk1]

@all

http://www.youtube.com/watch?v=1uN-yNgtt4c

Its a must see from lidmotor again a new one.

[Pirate88179]

Mark:

He does some fantastic work doesn't he?  I could never keep up with that guy.

Bill