Dual-Band (UHF-VHF) J-Pole Ham Radio Antenna

grabcad

I followed the ARRL Antenna book's dimensions to create my antenna, which can be found online. For assembly, use small bolts through the straps and wood mount. Ensure all tubing connections are properly sealed. To connect the coax, strip the end and attach the center conductor to one bolt on the radial strap, while the shielding goes to the smaller bolt. Tune the antenna by adjusting its position relative to the mount and straps; once tuned, secure it in place. According to user reports, the SWR is less than 1.5:1 on VHF and slightly higher on UHF. The cost of materials was around $20 USD for two antennas at the time of construction, and I've found that the antenna performs exceptionally well.