JPC12 7MHz-50MHz 100W All Band HF Portable Shortwave Antenna for Amateur Radio
14Mhz with 6 circles near the rod antenna, retracting the pull rod about 20cm, SWR: 1.1-1.3 (on the marked red line with gold). 21.4Mhz with 4 sections of aluminum tube plus 7 sections of rod antenna + 10cm, SWR:1.1-1.3.