The JPC-12 - Third time's a charm? 

You’re welcome!

Happy to help, I sure hope you picked some of the other advice as well. See you down the bands! PS: Sarcasm doesn’t come across well on a keyboard.

It was indeed a good and informative video, just thought that part was kinda funny.

Glad it was helpful!

Thanks! I’m still not completely sold on the antenna, but we’ll see with a POTA tomorrow.

It's not a half bad antenna, but it's cumbersome to tune. Once it is tuned it actually performs pretty well.

It is by no means an easy antenna to tune, but if you follow these guidelines it will be easier at least. And yes it is pretty broadbanded.

Looking forward to your video.

Thanks!

You can find them in the comments.

The only issue with that is that we don’t use window mesh here.

Thanks!

You're very welcome!

I just borrowed that antenna, so I don’t know unfortunately.

@@LB0FI thanks

Yes, I have tried it several POTA activations, I have a total of four videos on this antenna. As for the list, I can't find that anymore, so you will need to take notes from the video unfortunately. Thanks for commenting!

You are comparing two or three very different antennas for two or three very different use cases here. Sometimes you are space compromised, or just have too many people around for the two options you talk about, and then having something a little bit more flexible than a hamstick could be a good thing.

​@@LB0FI Yes, that's true. I'm thinking of just the antennas alone - assuming that space etc don't matter. By the way you can use a EFHW vertically too - obviously that requires either a very long pole or only using higher bands. It has an advantage of a very low take off angle. Ultimately there are pro's and con's always I suppose.

Everything is explained in the beginning of the video. It was posted in the comments on the previous video of this antenna.

I hope you are aware that this video is almost a year old, and shot in the middle of pollen season.

@@LB0FI 👍😆

Look above. I hoped you would understand that it was meant as good humor. You did figure it out.

I have something even better, I have a video on it. Besides that there’s a comment on the previous video with the complete list.

I have two options for you. Check the comments in the other video or take notes.

Lasse LA5PPA found this information somewhere on the net about a year ago and it has been of great help for tuning the antenna It is DO1HFS who made it in German so I use google translate to English. He also recommends adapting the radial set if you want to optimize for a particular frequency band 6m: Earth spike/radials/feed point/telescopic Extend the telescopic 3-4 sections. An average SWR of 1.2-1.7 is possible without further changes. Fine adjustment via telescopic 10m: Earth spike/radials/feed point/telescopic Fully extend the telescopic. An average SWR of 1.2-1.5 is possible without further changes 12m: Earth spike/radials/feeding point/2x aluminum rod/telescopic Fully extend the telescopic. An average SWR of 1.2-1.7 is possible without further changes Fine adjustment via telescopic 15m-1: Earth spike/radials/feeding point/4x aluminum rod/telescopic Screw all four aluminum rods together and screw onto the feeding point. Telescopic except for one link Extend completely and screw onto the aluminum rods. Without further changes an average SWR of 1.2-1.5 possible 15m-2: Earth spike/radial/feeding point/3x aluminum rod/telescopic Just screw three aluminum rods together and screw them onto the feeding point. Fully extend the telescopic and screw onto the aluminum rods. An average SWR of 1.2-1.5 is possible without further changes 17m: Earth spike/radials/feeding point/4x aluminum rod/telescopic Fully extend the telescopic. An average SWR of 1.2-1.7 is possible without further changes Fine adjustment via telescopic 20m: Earth spike/radials/feeding point/4x aluminum rod/coil/telescopic Extend the telescopic completely and place the coil between the four aluminum rods and the telescopic install. Place the pickup sled on the top red mark for 14MHz. An average SWR of 1.1-1.4 is possible. 30m: Earth spike/radials/feeding point/4x aluminum rod/coil/telescopic Extend the telescopic completely and place the coil between the four aluminum rods and the telescopic install. Place the pickup sled about EIGHT clicks below the top red mark. An average SWR of 1.1-1.5 is possible. 40m: Earth spike/radials/feeding point/4x aluminum rod/coil/telescopic Extend the telescopic completely and place the coil between the four aluminum rods and the telescopic install. Place the pickup sled on the lower red mark for 7MHz. If necessary, the slide can be moved by one or two Coil turns are pushed up. An average SWR of 1.1-1.4 is possible.

Thanks Much aprpeciated.

​@@LB0FIThanks for sharing these instructions and thanks to LA5PPA & DO1HFS for compiling them.

Manuals are absolutely an issue with a lot of Chinese products unfortunately.

It's not a half bad antenna, it is just very cumbersome to use it.

Electrically or physically?

@@LB0FI Electrically in this case, but if you can get your hands on the 1964 ARRL Antenna Handbook, a remarkably similar antenna with equally similar loading coil is described on page 308 (right down to the hardware used for the sliding contact), so when there are videos titled PAC12 fail and whatnot, I can’t read it any way other than “user fail”. I do happen to be aware that physical quality of the thing is surprising for a mass produced China thing.

@@BrekMartin Thanks for commenting.

Everything in this hobby is a compromise. And yes it radiates, but no, it does not radiate as well as a quarter wave, but you get the benefit of a more compact kit. And that being said, there's not really any magic in this, it's a vertical with a loading coil.

Her name is Kathinka, but we usually just shorten it to Tinka. She loves wire antennas and radials more than radio itself :)

The mower is Shawn, not Sean 🤣

The mounts are M10 - metric. Get an adapter.

You are most welcome!