Original 25 October 2000
Revised 18 November 2000



The primary coil used as an example in these pages experiences 100's of Amperes at 117kHz. As such, 8mm diameter copper tubing was used for this application. Since it will be oscillating with a 0.037uF capacitor the inductance works out to 50uH.

Both helical and spiral wound coils were considered and the latter was chosen. The coil was wound in a single plane with the inner diameter at 325mm and the outer diameter 600mm. The final arrangement had 9 turns of 8mm copper tubing. Pictures are planned for this page.

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