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Really nice bi-polar! Was there a corresponding change in the primary capacitance with the change in your primary coil? -----Original Message----- From: Tesla [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of Douglas Johnson Sent: Monday, February 18, 2019 12:24 PM To: Tesla Coil Mailing List <tesla@xxxxxxxxxx> Subject: **External Email** [TCML] Coupling and Primary Here is another video of the adjustable coupling. original primary was 10 turns .060 wire, this primary is 4 turns of 1/4" copper. Both primary's are 5" total diameter. Performance is much better! Doug https://youtu.be/mXPoXpcY0so _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxxxxxx https://www.pupman.com/mailman/listinfo/tesla This email and any attachments are for the sole use of the intended recipient(s) and may contain confidential information. If you receive this email in error, please notify the sender, delete the original and all copies of the email and destroy any other hard copies of it. _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxxxxxx https://www.pupman.com/mailman/listinfo/tesla