On 3/20/14 7:36 AM, David Thomson wrote:
the conductors are very tightly coupled.. It's just like a coil wound with fatter wire or with Litz wire.On Thu, Mar 20, 2014 at 7:22 AM, t-burns14 <t-burns14@xxxxxxxxxxx> wrote:Have any of you wound bifilar coils? What is the difference in performance?Bifilar coils effectively increase the wire diameter by two. The difference is a higher current, lower potential output at the top load. The streamers are brighter, thicker, and snappier. Now that I think about it, It also seems to add an extra dimension to the resonance in the secondary. Instead of having a single conductor in resonance, there are now two conductors in resonance.
Basically N/2 turns, same length.For long skinny coils, where the magnetic field coupling from one end of the coil to the other is lower, inductance is almost as much a function of length as number of turns.
For a tight coil with all the turns in a small cross section (think transformer winding), the inductance is more like N^2, but for long coils, it's more like N...
Check out the Wheeler equations and build a spreadsheet to experiment.. _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla