[TCML] bipolar coil

[bartb]

Hi Woo,

Dr. Jeff must be using a small cap size for the turns. This is an actual 
bipolar coil also, unlike what I think Kris is building. Dr. Jeff's 
bipolar is a nice little coil! I built one similar in size, although it 
was not used as a bipolar coil, but rather a hv source for a Seibt coil.

http://www.classictesla.com/seibt/Img_2870.jpg

I've been wanting to turn this thing into a self-contained bipolar coil 
(however I need to replace the wooden primary runners with something else).

Take care,
Bart

dr.hankenstein at earthlink.net wrote:
> Kris,
>
> Here is a picture of Dr. Jeff's small bipolar coil: http://www.drspark.org/images/jeffbipolar/Dsc_0185.jpg  If I recall correctly, he's using a 9kv / 30ma neon sign xfmr with a Sangamo mica transmitting capacitor and a 5-break stationary spark gap. Tuning doesn't seem to be very critical. Secondary is rather small, maybe 2" x 12" or so. Small coils are alot of fun!
>
> Woo
>