Joule Thief

[jeanna]

You are right about not needing a bridge , it lights better without .

The circuit is a regular jt circuit it seems to work pretty much any thing for resistor , i tested from 2 k to 0 .

These are my data for shorting the secondary with various components.

battery level =1.21v
measured across C-E junction
no secondary short of anything = 1.18v
1- straight short =0.96v
2-cfl  =1.15v
3- 47r  =1.03v
4- 147r = 1.06v

----
MK1
I am not clear about your light. xee2 seems to think it is a filament bulb, yet you seem to respond with led bulbs.
Are you in fact using a filament bulb?

thank you,

jeanna

[jeanna]

Here ist,

If you do as jim proposes, then you can check with every combination without rewinding.
In the way I did it when tuning my big gold, I took the base turns down to 2, which worked.
Then, I  un-wound each collector turn until the volts on the secondary ceased to rise. [I ended up with 2kv doing this.]

This device, would allow you to easily check the tuning with 3T on the base again as the collector coils go down, instead of assuming that the lowest base turns is the best.

It would be a very good way for people to get a handle on what part of the coil makes what kind of changes.

jeanna

[innovation_station]

no

J

its like this ... 

FEED IT A CHANGEING SOURCE ...

: )

LOVE YOU !

think i can hetero dyne that with a BUCK STORE AM RADIO .....


lol

ist!

[jeanna]

no

J

its like this ... 

FEED IT A CHANGEING SOURCE ...

: )

LOVE YOU !

What are you talking about?
Are you talking about my data?
are you talking about my explanation of jim's jt idea?

Feed WHAT a changing source?

j

[innovation_station]

it serves many uses!

: )

w

jims tool

come on guys and gals .. were just rebuilding R2D2!   lol!

: )

NUTTER RA HA!

cept this time they both get wings

W

THE KID says all summer long .... : )

http://www.youtube.com/watch?v=HFOV78Pi358