Thank you so much for your support, I really appreciate it.

The reason I build the coil for the bottom of the band is that if I want to use it at a higher frequency, it is easy to bring the antenna into resonance by shortening the whip slightly. If it was built for the middle of the band, and if the SWR wasn't ideal, I wouldn't have any whip available to lengthen for resonance.

@@KB9VBRAntennas I ment high up on the antenna not the band.

No I am not. This is intended to be a resonant antenna. If you want to tweak the SWR a bit (say you were operating in the phone portion of the band), you could just shorten the whip slightly.

You could use the Blank adapter and ground spike with this coil. You'd then attach your ground radials or screen to the spike. I show this setup in my recent review of the Blank Adapter and M-Coil kzbin.info/www/bejne/rIm5d4mjp5isr7c. Operationally this coil is no different than the CHA M-COIL or the Sporty Forty. The only difference is that it lets you use the 25 foot whip instead of the 17 foot whip.

With the whip fully extended, the antenna will resonant at the bottom of the 40 meter band. So there isn't much wiggle if the resonant point is higher and you need to extend the whip length. (This can happen with certain ground conditions where the conductivity is very poor). In prototyping the design, I made a 2nd coil with 11 turns of wire. This brought the resonant point down to 6.7 MHz. At that frequency I had to shorten the whip by one entire section to bring it into resonance at 7 MHz. I'm thinking, if I build another one, to maybe use 10 1/2 turns of wire. You may have to shorten the whip slightly depending on your operating frequency, but it would give you the headroom necessary for just about any ground condition.

​@@KB9VBRAntennas Excellent. . I'm going to go with 10.5 turns. Thank you so much Michael. 😊

It should work fine with a mag mount, I've done similar with the Sporty Forty and 17 foot whip. There isn't any difference, operationally, between that setup and with this coil and 25 foot whip.

I'm glad to get you in the log that evening. Let me know how your coil works out.

Great question. The coupling is for joining 1 inch PVC pipe, so it has an inner diameter of 1 inch and an outer diameter of 1.6 inches. This is the item that I used: www.menards.com/main/plumbing/pipe-fittings/pvc-pipe-fittings/nibco-reg-socket-schedule-40-pvc-coupling/f00030t/p-1444449180118-c-8571.htm And for your reference, the plug is also labeled at 1 inch: www.menards.com/main/plumbing/pipe-fittings/pvc-pipe-fittings/nibco-reg-spigot-schedule-40-pvc-plug/f01021d/p-1444449159872-c-8571.htm

It's the Heil BM-17 dual side headset. I did a video on them a couple years ago: kzbin.info/www/bejne/p3OUq2WdbdJjb5I. They are temporarily discontinued, but Heil is coming out with an improved model early this year.

It's the frugality of the Midwest. Leave no whip length wasted.

What disadvantage are those? Radiation pattern?

At the very least, it's a good reason to go out and spend money on hand tools.

That should probably work. Many, many years ago I built a Buddipole using the plans that W3FF originally published. The low band coils were wound on 2 inch CPVC and he used foam pipe insulation inside the form to hold them in place on the horizontal members. A piece of foam or pool noodle could keep the coil from slipping on your crappie pole.

Thanks for the support, I really appreciate it. If you are ever in the State, drop me a message.

I don't see a reason why not. My only concern would be the physical stress on the coil itself. I'd make sure the pieces are all well glued together.

Third highest point in the State, but with the tallest height above average terrain.

You don’t need a coil for the 20 meter band, the whip is long enough. Just shorten it to about 17 feet and it will be a true 1/4 wave radiator.

I am thinking of a 60 meter coil, it should have enough bandwidth to cover all five channels

Thank you. It’s all wool so it is quite warm, even in these bitter cold temps

He used the faraday cloth “magic carpet” probably

I did not specifically test it with radials, but I’m confident it will work the same as the sporty forty. For that, I like to use 8 16 foot radial wires.

Let me know how it works for you

@ will do. Perhaps I can make a QSO with you on it. I can hear you here in NY most of the time when you are doing POTA.

I guess WRC is finally open again, but they probably have a backlog of orders to work through. Let me know how this works for you

Got a tree and 25ft of wire?

You could use wire. The chameleon whip is worth the investment, though. There are lots of antenna styles you can do with it

@@forgetyourlife I had a similar thought, but using one of my bigger masts. Might try an 80m coil which looks to be 25.5 turns.

In my experience with the SB1000 coil on 80 meters, the bandwidth gets tight, about 25 KHz. That's the downside of fixed coils on the low bands. But if you only want to use it on a small range of frequencies, they are ideal. I'm thinking of making one for the bottom of the band for the digital segment.

@@KB9VBRAntennas Good to know, I thought that might be the case.