Here are a few links: This explains how it works (PA0RDT was the original developer): http://www.pa3fwm.nl/technotes/tn07.html There are many links on Ebay and amazon for complete ready to hang kits. I opted for a DIY kit from amazon: https://www.amazon.com/10KHz-30MHz-...ld=1&keywords=mini+whip&qid=1618853030&sr=8-4 The amazon link above comes with two warnings: 1) there are no instructions, so you better be handy with rosin and solder 2) if you connected the injector backwards you can mess up the injector...be mindful with the direction. Consult my photos above for correct orientation. Ive used the mini-whip mostly un-grounded so far. Im certain that using it as directed the performance is/will be stellar as its already very good with no ground. A large metal slug may be enough of a ground I've observed.