New antenna system for portable operation 

Wow. Good info Jim. That coil and method looks like a winner! 73 de N4SHO

Didn't go to Hamvention, so thanks for bringing these products to our attention. Regarding the faraday cloth: i folded the edges, and secured the fold using the faraday tape which comes with the cloth. Keeps the edges from fraying. I also purchased a grommet kit (they are very inexpensive on Amazon), punched 8 grommets on the periphery of the faraday cloth, and lay it down and stick in small Aluminum tent pegs. Keeps the faraday cloth secure and in place, and holds well in fairly gusty winds. Also, i had mentioned in another video, several people here use chicken fence wire rolls, way cheaper than window screen and available in any length you want, works well too. I like the faraday cloth best because it fold up compact and is the lightest. Also carry 4 radials as a backup.

Grew up in nearby Huron. Left Ohio in 1975,became Ham 40 yrs. Later. Enjoyed video,especially Lake Erie History! 73 W7OT

Interesting innovation. I wonder how much loss there is in the inductive coupling? It would be good to measure this with a VNA like the nanoVNA.

I like the simplicity of design, adjustability and ability to lower SWR shown in the video.

Great video. Just found your channel. 73

Thank you, Jim.

Excellent very good presentation. I like the dip curves

The ground screen off to the side like that will drastically affect the omni-directionallity of your vertical. Put the cloth in the direction you want to work.

Add a capacitance hat near the top of that stinger will improve the radiation resistance on 40m-80m

I'm not a fan of PVC pipe construction. Nonetheless, nice to see this application of variable inductive coupling and integration of a matching network -- what's old is new again.

Thank you for making this video and sharing it with all of us! I am subscribed to the channel with notifications enabled and thumbs up! Question: Before you add any kind of coil, when you have the antenna whip acting as a quarter wave antenna fully extended to 17 feet and ground radials connected, what is the maximum power rating of that configuration? Reiterating and clarifying my question: When just using the quarter wave with the telescopic whip and any required radials, no coil connected, which is why my example would be 20 m through 6 m, what is the maximum power that that set up can handle?

Thanks for the nice walkthrough. While the stinger is a bit longer than the 17’ telescopic whip, it looks nice and robust and aluminum is a preferred material with less resistance. So if you put the capacitor in the circuit, since it connects to the tripod, it could be said that it tunes the ground system a bit (and then you further refine the total match with the inductor that’s in series with the whip)?

Jim, have you by any chance had a chance to play with the new 25 ft whip from Chameleon with the Amratek coil. With either the loading coil mode or in the matching network mode, i am having no luck getting a resonance point (using a rigexpert to sweep the band). Any advice appreciated.

I assume i can leave the coil permanently attached to the base and the stringer to the coil., and when i want to use 20 thru 6M i just bypass the coil with a clip lead. That way i can also switch quickly between 20 and 40M, Kindly confirm that this wont pose any harm to the coil? 73 de k1jbd, Bammi

I assume the 80m slider will also tune 60m, 40m, and 30m?

Link is not working?