Joule Thief

[crowclaw]

Pictures work best if reduced to 640x480 before posting.

Whoops... what did I say, I'll have another go... sorry It is my first time.

[crowclaw]

Pictures work best if reduced to 640x480 before posting.

@Xee2
Thanks  Merv

[xee2]

@ crowclaw

Xmas party piece.

I assume that a JT is built in. Nice job. Did you say it was powered by your new wireless power invention and sell stock in your company? I bet they would have believed you.

[Mk1]

I graphed some data from JT I have built. It seems like there is not much point in using more than about 150 turns. I plan to add another data point at about 150 turns. I think this would be a valuable thing for jeanna to check me on. She is good at catching my mistakes. This data is with 2 base and 10 collector turns and a 2N3055 transistor.

EDIT: This result may be due to not having enough battery current. I wll try to test that.

EDIT: Using 2 D-cells and a 10,000 uF capacitor in parallel for a power source pushed to voltage with 250 turns up to 701 volts. So there is some performance limitation due to battery current, but not enough to be the main cause.

Nice graph , i have a question for you , at some point you say its useless to put more turns on the pickup, once you have reached that point could you try bigger gauge wire on the jt side to see if it gives you the same voltage.

I hope this make sense , really nice work there , as usual , Thank you !

mark

[Pirate88179]

@ crowclaw:

Nice job!  What are you powering that with?  It looks good.

@MK1:

I am wondering the same thing.  On my Jeanna Light toroid, I removed the 28 ga. magnet wire (13 turns) on my collector coil and have replaced it with 22 ga. insulated stranded wire and I started at 13 turns and have been removing them one at a time.  As I remove the turns, my volts go up but, my feq. has dropped evidence by my decent zap the other night with my fingers.

Xee2 said my freq. should be going up while removing collector turns and he is probably right because I may have dropped way down in freq. just by making the wire gauge size change on the collector and now as I remove them it very well could be going up.  Actually, I believe it is now that I think of it.  My buzzing is now almost so high you can't hear it.

Bill