The new version of the antenna replaces the adjustment screws and plugs on the original jpc-7 and pac-12 with a sliding adjuster, making it easy to adjust the standing wave, and it is not difficult to adjust the screw to adjust the standing wave. Now, just slide the adjustment slider with your finger.
Reference data for slide adjuster use: 14 mega slider position between 6 and 7 turns on the side of the whip antenna, 7 megabytes between 7 and 8 turns on the side of the aluminum tube
Note: When using, let the shrapnel be between the two coils, do not deliberately put on a coil