The JPC-12 (also known as PAC-12) is a portable HF vertical antenna that features a very handy set of parts that assemble quickly and that is able to cover, officially, 40m through 6m, but, unofficially, 60 and 80m as well. It handles up to 100 watts.
This antenna has been in production for several years now. The new version of the antenna, put into the market in October 2020 included an improved version of the main tuning coil. This new version of the tuning coil has been marked with the right number of turns for the 20m and 40m bands, making it easier and faster to set up, even without an antenna analyser.
Figure 1: Installation detail of the JPC-12 / PAC-12 antenna on the field. In red, Paracord ropes acting as guy ropes. On the field, and barely perceptible, counterpoise lines (8x) evenly distributed around the antenna.
Figures 2: Detail on the counterpoise used in order to improve overall antenna performance.
Figures 3: Detail on one of the setups for 10m band.
<aside> ⚠️ If an additional coil without preselector slider (can be acquired separately or customised) is added to the installation, with the two coils superimposed together, and adding an equivalent counterpose to a 20 meter ground mesh, the JPC-12 antenna can work in the 80m band as well.
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Figure 4: Standard parts of the JPC-12 antenna