Joule Thief

[resonanceman]

But Gary, it is the opposite.
It is easier to light the longer ones.
They are so much bigger volume and have so much more surface area to light.

Jeanna

I am  pretty sure about the  thing about having to overcome  the   internal  resistance .
I would say that  the  long  ones  are probably an older style ....... they  probably have more mercury or what ever they use to lower the internal  resistance .

I do know that they have been working at  getting the amount of mercury  down for  quite a few years .

gary

[jeanna]

Ha Jim,
I was just looking at and catching up on johnnydavro's rattlesnake egg magnet bedini.
Everything except the circuit diagram reminds me of the jt.

But it does look like fun.

====
theNOP,
Go ahead and be as pedantic as you wish.
Just be the way you are, OK?

=====
Gary,
ooo older style. I suppose that is true. Very little attention has gone into them. I guess I could get another long one while there is still time.
I wonder how many turns it will take to get 600 volts? If II can get 600v I should be able to light anything.

happy winding,

jeanna

[electricme]

@ALL
Electrical Safety around the MOT transformer.
This makes a very good read, see below.

@Jeanna,
There are 1.2 turns of wire in a MOT to make 1 volt on the secondary, so measure the secondary output, divide by 1.2 and bobs your unkle, the number of turns on the secondary, as is seen in the below article.

http://www.users.on.net/~endsodds/psrewind.htm

Another way is to drive a wood chissle into the winds, cut them right through, pull them out and count them, thats the way I was tought back in the "early" days 

jim
 

[innovation_station]

im just wondering what is the result if ....

we used a mot  primary only ...  and pulsed both pos and neg in sync  and did not capture the colpase  of the  primary  like if we blocked it  and forced it out the secondary ...  rectified into the next mot .....

ist

[jeanna]

@Jeanna,
There are 1.2 turns of wire in a MOT to make 1 volt on the secondary,

... bobs your unkle,

==========



that is called a head road right?

bob?

Don't even think about me and a mot.
no way hosay!

I was wondering if it took me 240 turns and some magic with the tuning, to get 450 volts, could I add another 80 turns and get 600? Or, was it more magic than turns?

jeanna