@gary
No i wasetn saying you were wrong just a comment.Ã,  You guys should start a thread if you want to get into the bedini stuff.Ã,  Alothough i like it i dont want this thread misguided by it, in the sense of straying from the end goal.
Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Ã,  Joe

My understanding from my reading is that this is back EMF.  I am not sure what that is exactly but, maybe no one knows. Thanks for the warning about the batteries.  Yes, caution is always a good thing.  I just love to learn and by doing stuff, I learn....for good or bad.  I can post links to videos here if anyone is interested.  I still think that all of this is related in some way or another to our final goal.

Bill

Quote from: epiphany on March 29, 2008, 01:09:58 PM
@Jeanna,

I'm not clear on that. Are you proposing an excitation method using another earth battery cell? Sorry for being so dense here...

Hello all i was just trying to help out with this project. take a look at this link?
http://w1tp.com/perbuild.htm

you will find out how to make a Telegraph key with a spark gap and a buzzer for this NS coil/Battery.
it's very easy to build.  just hold the key down and the buzzer will work until you let up.

@Pardon,
Thanks for the link. That looks like the drawings Hans and Joe have suggested. I am glad to have a how-to. It looks like a thing I could build, if I need the outside voltage.
----------------

I went to a couple of calculation sites just now to get an idea of what the potential is for a circuit  like the ones I have in my kitchen.

Since my coils max at about 400mvdc, I plugged that in. 1 ohm is what the copper in the coil is (actually 1.6 or 0.6) . It is hard to figure the henries because of having the 2 wires, so I ignored the iron wire and plugged in the copper only and that is around 63uH. I have a couple of cap sizes I could use but you will see the difference may be large but will be hard to tell. I plugged in 1uF and 10uF.

So, with all that said, the results of a simple RLC circuit (and this is not simple ) look like this

Using 10 uF the
Time between sparks on my coils will be 36u seconds or 6.38KHz frequency
yielding 36 mA at the peak of the time graph which I believe is the point of the spark.

Using the 1 uF cap, the
Time between sparks on my coils will be 12.8u seconds or 20.2KHz frequency yielding
46 mA at the peak.

This is my understanding of these values. I will take all well considered corrections. 

Also, it is likely that having the iron wire in there etc will change all this a lot, but it is a place to start when figuring frequency of our coils.

36 or 12 micro seconds is a really short period of time. - that is the quarter wave. the full wave is 156 or 48 microseconds. - still a really fast pulse.

I do not have a coil that has a frequency of 60 Hz. To achieve that I would need this:
1800 turns on a coil with an average diameter of
1/2 inch. using
24 gauge copper wire.
(This assumes a standard RLC ciruit.)

I also saw today a pic of a spark gap made of 2 pointed pieces of copper tape (slug tape) The points were facing each other and were REALLY close to each other. the set up was made on plastic tape. It may be all we need for a spark gap.

the 2 calculation web pages are:
http://www.crystalradio.net/cal/indcal2.shtml
and
http://www.coilgun.info/mark2/rlcsim.htm

the page and pic of the simple spark gap is
http://www.emcesd.com/tt2001/tt060101.htm

jeanna 

Quote from: Pirate88179 on March 29, 2008, 11:49:44 PM
My understanding from my reading is that this is back EMF.  I am not sure what that is exactly but, maybe no one knows. Thanks for the warning about the batteries.  Yes, caution is always a good thing.  I just love to learn and by doing stuff, I learn....for good or bad.  I can post links to videos here if anyone is interested.  I still think that all of this is related in some way or another to our final goal.

Bill

Bill

There is a  thread somewhere  on  this  site about  back emf and  flyback.
I really  like the name  back emf  better , but   from what I  understand  back emf is actually the  what  slows down the  flow of power  as a coil is charging .....  If we could  eliminate  back emf  a coil would charge  instantly ...........

I agree  that  we really  don't  understand   what  happens  when  a magnetic  field collapses  quickly ......... and that to me makes it  interesting .



I agree  with   Joe  that   we should not  fill this  thread  up  with   talk that is  unrelated to   earth batterys  ........so this is my last post here about  back emf


gary