RE: conical secondaries (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Fri, 15 Jun 2007 15:18:44 -0500
From: David Thomson <dwt@xxxxxxxxxxxx>
To: 'Tesla list' <tesla@xxxxxxxxxx>
Subject: RE: conical secondaries (fwd)

Hi Scott,

>      Why do some small coils have conical secondaries?  Thanks a heap.

Conical secondaries can be thought of as combination flat spiral and tall
solenoid coils, such as I have built:
http://www.tesla-coil-builder.com/FlatSpiralSolenoidCombo.htm

The advantage of a conical coil is that it can contain more power (current
times potential) before breaking out than if a pure flat spiral or pure
solenoid coil were used.  So if you are trying to build a small coil to
handle the maximum power, the conical secondary is the way to go.  

David W. Thomson