Stubblefield coils (bifilar) and speculations

[Pirate88179]

@ Gary:

Nice coils.  About the rebar tie wire, did you test it with a magnet?  I almost used that but when I was in the home building supply store, my magnet (neo) had very little attraction to it. (Not much iron in it)  I found some fence wire that it was hard to pull my magnet off of so I used it instead.  I am not a chemist but I figure if it is strong on a magnet, must be a lot of iron content.  Same with the rebar I almost used for my core, very little attraction. So I used the galvanized (zinc coated) spikes which were also strong magnet pull.  I am sure all of these products vary from supplier to supplier and place to place.  Just a thought for you.


Bill

[jeanna]

Gary,

What happens when you hook it up the way Tesla invented. He said it was a great improvement over the previous way.

Make the inside copper wire longer enough to attach to the outside iron wire. Then I guess you will be left with just 1 pair of leads.(makes things easier for me  ).

Tesla said what he was improving was the self dampening (I chose that word) effect of the pancake coil. I am assuming there is a similar dampening with this bifilar pancake.

I promise to wind my own    , but I would love to know the difference sooner.

jeanna

[resonanceman]

@ Gary:

Nice coils.  About the rebar tie wire, did you test it with a magnet?  I almost used that but when I was in the home building supply store, my magnet (neo) had very little attraction to it. (Not much iron in it)  I found some fence wire that it was hard to pull my magnet off of so I used it instead.  I am not a chemist but I figure if it is strong on a magnet, must be a lot of iron content.  Same with the rebar I almost used for my core, very little attraction. So I used the galvanized (zinc coated) spikes which were also strong magnet pull.  I am sure all of these products vary from supplier to supplier and place to place.  Just a thought for you.


Bill

Bill

I just checked my  rebar  tie wire ...... my neo's  stick pretty good .    good enough that I could not pull  them off  with  slightly sweaty fingers



Has anyone  else been shorting out  their  coils   for a while to  get the  current  up ?

Mine  has been  shorted most of the time for around  6 hrs now .

WHen  I disconnect   the  jumper  the current  readings go up  pretty fast ........then  level off ......... amd then slowly  drop  a little . 
The  peak   this time was  1.395  mA ...........  after about  5 min  it is holding  at 1.391 mA


I am going to leave for a couple  hours ........I think I  will leave it shorted 


gary

[jeanna]

Gary,

I don't  have any core at all .......I am just measuring  between the copper and iron .
doesn't seem to matter  what end .

The only thing I did  is  get it wet   

even the inside of one to the outside of the other?

jeanna

[Pirate88179]

@ Gary:

I am glad you checked with the magnet.  I know that saved me a lot of problems on my first two coil attempts. I am going to try to get some more wire this week to try one of these.

Maybe I should try shorting my buried coil for a while?  Hmmm.  I'll try anything to up the output. I believe Chad has our mA record here with almost 150.  This is getting somewhere.

Bill