Primary Help

From:  D.C. Cox [SMTP:DR.RESONANCE-at-next-wave-dot-net]
Sent:  Wednesday, June 03, 1998 4:35 PM
To:  Tesla List
Subject:  Re: Primary Help

to: Mike

Use some scrap 12 AWG house wiring and approx 24 turns.  Tap as necessary
to find the best tuning point and then replace the wire with a neat setup
of 6 AWG or 1/4 inch copper tubing.  First you need to find the correct
tuning point and sometimes it may require 12-14 turns or more.  Experiment
with many turns laid out on some edge slotted scrap cardboard until you get
the correct number of turns.  Use a flat spiral for this coil -- should
produce 12-14 inch long sparks as a minimum.  In short, you need more turns
to hit resonance.  Also, for tuning, use a sharp point off the toroid so
you can start breakdown earlier and see each change as you make turn


> From: Tesla List <tesla-at-pupman-dot-com>
> To: 'Tesla List' <tesla-at-pupman-dot-com>
> Subject: Primary Help
> Date: Tuesday, June 02, 1998 10:02 PM
> ----------
> From:  Michael Andrus [SMTP:andrus-at-ccountry-dot-net]
> Sent:  Monday, June 01, 1998 10:13 PM
> To:  Tesla List
> Subject:  Primary Help
> I have a secondary that is 4" PVC and the coil is 18.5 inches long.  It
> wound with 21 guage wire, enameled.
> The tank circuit is a 15Kv 30ma NST with a .0049 Mf bottle capacitor.
> It uses a RQ gap with 4 gaps.
> My terminal is a torus 4"X14"
> What type of primary would work with this?  I haave tried the following,
> 1) 12 guage house wire 12 turns vert. 8 in. diameter, 8" sparks
> 2) 1/4" copper tube flat spiral 7 turns from 5" to 16", no output
> 3) 11 guage enameled flat spiral 24 turns 5" to 16", no output
> I need a lot of help in this area, Please help.   M. Andrus