Resonant Multiple Half-wave Antenna Coil - For K6ARK Antenna, Dudetenna and more

From K6ARK's documentation on his kit utilizing the 1934-1079-ND toroid:

Link to Adam's documentation -

https://docs.google.com/document/d/1G5euBoeTSbF6Jqc6FvO8YTpzVx5Zk1sMcjSNHi5y2LQ/edit#heading=h.d3v93bcqcmw2

"Resonant Multiple Half-wave Antenna
Adding a small loading coil can help bring 20 m, 15 m, and 10 m into resonance on a 40m wire. Start by attaching a spool of antenna wire to the matching unit. Use the ¾” long piece of .7” dia tubing to wrap about 10-12 turns of wire, 6 feet from the feed point of the antenna. Keep it from uncoiling with tape or slits in the plastic. Unfurl enough wire for resonance on 40m, then test on 20m and 15m. Adjust the coil as necessary to bring those bands into resonance. Once the right location and turns are found, secure the coil with heat shrink, cut the wire long, and trim to resonance."

So I made this little coil. I have a bit of work to do, but it does work and brought 20, 15, and 10 a lot closer to resonance. Video coming soon.