JPC-12 Quick Deploy Portable HF Antenna With A Neat Carry Bag

Long live my good old analog analyzer hi tnx for the video, I love my Antenna.

Copper plating the ground spike would add cost for something that would wear quickly when driven into the, um, ground. Stainless steel provides ample conductivity.

My first antenna... I'm beginner. I'm happy with this stuff.
With nanoVNA, it's a good way to learn antenna, radials, SWR ...
It works well with low power transmitter 20W.
A lot of spare parts.
I made 20 radials, and now this antenna is perfect for budget.

Use this antenna since 2 1/2 years, other name was PAC12. Use longer telescope 5.6m and you don't need the coil at 20m anymore. At the connector base I sanded off the varnish (top and bottom), a few OM said, they had have sometime contact problems there. In addition, it should be said that each individual part of this antenna can be purchased separately. At 40m/30m this antenna is a kind of compromise, at higher bands starts with 20m the performance is good.

I have one and it works fine, i made a car version of it mounted to a magnet.

Nice and light weight 😊

Center coil is better , look at the many good quality screwdriver antennas. Nice kit for the HAM who has everything , The price! How long are the radials? It would be nice with a base clamp , so you can install the antenna on a balcony , or for better efficiency elevate the antenna.

Nice review.. 😊
I’ve got one coming ironically too.. had borrowed one and used it on SOTA as well as cable tied to the roof of the van for static mobile and it worked lovely..
Looking forward to getting mine and experimenting.

I've had one for about a year or so now pared with my g90 for QRP work absolutely love it for the simplesity of use and very well built aswell

They also do a nice looking portable shortwave antenna.

Most soil is slightly acidic, and copper does not play well with acids. Although a pure copper (read expensive) ground rod will work perfectly for many years, a copper plated one (usually they are plated in microns thick) will oxidize and strip off fairly quickly. I would prefer a ground rod made of any metal with above average acid resistance to a copper plated one, even in the expense of a little less electrical conductivity.

On a recent trip I discovered that the shortest possible configuration ... putting the totally collapsed telescopic whip directly on the base ... allowed me to tune 2 metres.

Nice video. I like the look of that antenna. What radio were you using ? Separate RX and TX ?

Purchased one and used it last week, tuned right up with very low SWR, no tuner needed,

okay so this is a direct ripoff of a budipole product with just maybe minor changes.

I've had the PAC 12 antenna for about 5 years which shares many of the same parts as this version. I'm very happy with the performance.

On the coil there are 2 colors red and yellow, with the whip fully extended, you can quick tune to 20m or 40m, easy!

It’s an easy antenna to tune on 20 and 40, but other bands is definitely a hassle. I made a video series on this antenna earlier this year, and it takes time to learn how to tune it optimally.

It’s easier to use than the Buddistick, but way more complicated than the Slidewinder DX.

I have always wanted to go colored this hobby. I just recently bought the RTL-SDR v4. Can this antenna be used with such SDRs? What does the term 5x9 mean?

Very interesting indeed…tempted to give one a go myself for SOTA…Thanks

If ya move 1 alum tube up and out the whip on top of that u will get a better match on 40 but if ya add a 34uh to 40uh coil at the base ya can get 80M on it but if u use thicker wire it works better and especially a choke at the feedpoint,btw on 80M atleast 4 x 5M lengths are needed

Hey, i have it’s antenna 😌🥲👌

Piracy buddipole antenna 😑

Treads are M10.
I am using adapters for
3/8"24
I also included an 5.6 meter telescopic antenna.
Strongly recommended

I forgot to add that the reason that a centre-loaded vertical is more efficient than a base loaded vertical is simply that the magnitude of the current at the base of a vertical is much higher than in the centre, so I**2 R losses are higher when the coil is placed at the base. This is especially true when the diameter of the conductor in the loading coil is relatively small. If I remember correctly, centre-loading does require slightly more inductance than base loading, but it is more efficient. - Michael VE3WMB

Have one for more than 1 year and it rocks. great antenna when you learn the tuning setup

Cool design jwitg the slider and those poles are exactly the same as the ones supplied with the Chinese vinyl cutters for hanging the sticker rolls. Usualy they would have a ball-bearing on the ends

This is a really good antenna. I've been using it for two years. 73!

Do you see anyway to attach a drive motor to the variable inductor? It would be pretty slick to have an automatic tuner adapted to manipulate that inductor. Use an an air motor so not adding emi. Very cool antenna.

Side note: Would you consider doing tutorials on SDR Console and SDR Uno? If you’ve done this already, apologies. I found some tutorials but were found lacking…

Good review.

I have one of these and it works pretty well, especially if you add more radial wire!
You can also get a 5.2mish whip for it and it can do 20m-6m without the coil.

I've also been very pleased. I've bought another coil and antenna to also make the dipole (jpc-7). Works great. Cheers

Is it a 3/8ths thread at the bottom to go on another mount if required?

did the spider survive?

These are a great antenna, bought one a while back for portable work. Worked Ferry in Indonesia on 5w from the west of Ireland 😊

I have the JPC- 12 and JPC-7. With the extra coil and other bits you can mix it up with vertical or horizontal / v dipole. Horizontal dipole is very good on 40 mtrs inter G. I keep the coil inline for all bands but will try without one day. You obviously need a tripod for the dipole configuration.

I had this one for almost 2 years now. Works a treat. The one thing I changed was the connector base, I replaced it with one that's made of aluminium and some kind of delrin, since the original one started to come loose and start twisting.

Good timing Matt, been researching this type of antenna for portable use whilst in my Campervan.
Your turning out some great content recently 👍 Cheers.....Ralph

Great video Matt. Looks cool. Yes always better to get the coil in the centre
73

My gripe with antennas like these....imagine climbing a 2000m mountain to go activate that sota, get up there and realise there is no soil, just bare rock....you ain't getting that spike in the ground.......

Not sure what the tubes are made from, there seems to be a little indecision from you.
Is it aluminum or aloooominum ?
🤔😆😆😆

The only snag for me is that the threads on this are not 3/8-24. Bummer. Other than that, well made.

Thanks for the video. With this antenna I managed to have a contact in FT8 on 15m with Indonesia from a beach in Northern Germany with 5 watts only. 73, DL1DBY

The middle-tuning antenna has a batter performance than the bottom-tuning one. I built both of it and tested them.

Best to separate all the ribbon cables. 4 radials is ok if they are elevated, but on the ground you need more. So pull them all apart. Going up to 30 is beneficial, above that the added value is decreasing and not worth the effort. What's the length of the radials? For 40 meters it would be best to have to have a few longer ones going up to 1/4 wave, so 10 meters.