Thanks everyone for the info I never heard that term gimmick cap before first I thought it was a coax cap. I'm 61 and been around since early 80s I guess I'm still a young guy in ham terms.. Here's the link to article I was referring to. https://topbandhams.com/tech-page/76-wb5wpa-1-4-wave-tuned-vertical-loopThanks 73 Fred KB4QZH