Re: Flat bifilar coils

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Xyme3-at-aol-dot-com>


In a message dated 2/21/2002 1:00:34 PM, tesla-at-pupman-dot-com writes:


<That could be a way to make a fairly small Tesla coil
with a very low resonant frequency. Insulating disks
between layers?>

Yes. 

> One thing i did 
> notice was that the battery i was useing became very
> hot in short order.
> Paul

<That would be no surprise, if I recall correctly you
were using a 9V battery. The DC resistance of your
coil has got to be pretty low, and a 9V is going to
run out of energy pretty quickly.>


Tesla called the coil, a coil for electromagnetics.  It was very odd, a 
compass placed between the two coils i wound caused the compass to spin in 
circles as if the polarity was changeing. One coil causes the compass to 
align.
Paul