Joule Thief

[Mk1]

@ Mk1

Like this?

@ xee

Yep , Just mark the numbers of turn you need , make a 45 degree angle to determine the length of the tube.

The last one was a 36 degree spacing , and 45 degree angle .

Most of the prior ones i have made only made 3 turns per revolution (astronomical definition) the result got i bit random .

I like my new technique , make a 45 degree stencil in paper , chose your spacing , take stencil make 45 degree mark , cut where the 45 and the next division meet.

Mark

[xee2]

@ Mk1

Then I assume the base and collector coils are like this. Are they close together as in this drawing or spaced far apart?

[Mk1]

@ Mk1

Then I assume the base and collector coils are like this. Are they close together as in this drawing or spaced far apart?

You got it , you are supposed to leave room between the wires .

The first coil i have made , most of the wires i got are too short , reason for the bigger gap.

The last one i have posted , did not have enough space , but i will test it anyway , we will never know otherwise.

The one i have posted lighting a filament bulb was like that , the 2 coil parallel to each other (like your drawing) .

This one one wire going one way the other 45 degree the other way making a x in the middle. this will be my second unit built like that.

I also edited my last post , with picture.

Mark

[xee2]

@ Mk1

Half way between like this?

[Mk1]

@xee

More like this , this is type 2 .