Sorry, here a better picture of the coil dimensions, Conrad

@Conrad,

Most of my NS coils had a full 25 foot roll of 18 AWG copper wire wrapped around a core that was about 1/2 inch in diameter.
Some of these cores were shorter than others.
I made 13 or 14 and I went into tedious detail and included pictures as well.
I am surprised you have not seen the posts.

edit
your drawing and the specs look very good and helpful - thank you.
=============
@All,
I have been thinking that the core was much more important than we realized.
If we chose a core of steel which "held" the magnetism for a while, the EMF with the collapse effect would be completely lost.
We kept trying to get the right kind of wires which are important to be sure, but I betcha the  magnetic collapsibility of the core is more important than the thickness of the wire.

thank you,

jeanna

Conrad, you must not have read all the forum, then, because I have the dimensions of MY coils, and so do a lot of the other members....right down to the size of the wire.
I know it is hard to keep read-up on the forum, and is much easier to just jump right in, but a lot of the time, all the answers are right in the previous posts.

Laser, thank you for posting the drawing.  Also, could you tell me what size magnets those are on your little "motor" cap"  Thanks, Laser.

To ProtonMom:

What takes more time? To write your post saying again nothing or to state a few numbers?

Is this some sort of revenge or disciplinary action, making new members read through hundreds of useless posts to find a few dimensions?

Thank you very much, this is some very strange form of collaboration. That makes me wounder about the purpose of this forum. May be it is more a Freudian thing than a quest for progress in a technical sense.

I read through a number of threads and the amount of psychological noise is staggering.

Conrad

Quote from: conradelektro on March 23, 2010, 05:18:43 PM
To ProtonMom:

What takes more time? To write your post saying again nothing or to state a few numbers?

Is this some sort of revenge or disciplinary action, making new members read through hundreds of useless posts to find a few dimensions?

Thank you very much, this is some very strange form of collaboration. That makes me wounder about the purpose of this forum. May be it is more a Freudian thing than a quest for progress in a technical sense.

I read through a number of threads and the amount of psychological noise is staggering.

Conrad

Please try to be understanding Conrad,

It takes a long time to make a thoughtful post as you probably know, since you have made some.
Picture this if you will:

You make many experiments over one or two years.
Someone new comes and asks for the essential details.
You kindly stop your current experiment and research your papers and posts from 1 or 2 years ago.

Then in 5 months someone else asks those same questions.
You already did the research and answered these questions only a few months ago yet here is the same question or questions again.
You hope someone else will do the work this time.

There is nothing psychological about this.
It is tedious and boring to cover this same ground over and over.

It was such a relief and joy when protonmom came forward and announced her presence having read the entire forum not one but 2 times.
You have no idea, but maybe if you do some experiments you will see for yourself what it is like to have to repeat the answers another time for the next newcomer, and it will be your turn then.

thank you for understanding,

jeanna