Dual Band J-Pole for UHF VHF - IW5EDI Simone - Ham-Radio
Slim Jim and J Pole calculator – M0UKD – Amateur Radio Blog
Dual Band 2m/70cm, J pole Antenna VHF/UHF , connector SO-239 | eBay
Figure I from Design and analysis of dualband J-Pole antenna with variation in “T” shape for transceiver radio communication at VHF and UHF band | Semantic Scholar
antenna theory - How do dual band J poles work? - Amateur Radio Stack Exchange
The original Ed Fong Dual Band VHF/UHF 70cm/2m J-Pole PVC Pipe Antenna : Eye-On-Stuff - YouTube