I just ordered one for $42 that will probably make my other two antenna analyzers obsolete. https://nuclearrambo.com/wordpress/nanovna-a-short-review/ https://www.rtl-sdr.com/reviews-of-...st-50-vector-network-analyzer/comment-page-1/ There appear to be many clones of this open source design. Here's a re-posting from a Groups.IO NanoVNA posting: "Hugen did a significant redesign of the edy555 vna, and clearly knows how to build them. I see three different marketplaces from which to buy one of Hugen's builds You can buy from him through taobao, though you have to deal with a website in Chinese and $20 shipping charges: http://gen111.taobao.com https://groups.io/g/nanovna-users/topic/32309232 https://groups.io/g/nanovna-users/message/603 There is taobaoFOCUS, an English language shop that resells stuff from taobao: https://shop.tbfocus.com/item.php?id=588815021483#4190873907712 https://groups.io/g/nanovna-users/topic/32513920 Hugen has suggested going through his friend on Alibaba. Note that the price drops to US$35 if you buy in quantity, an excellent choice for a club: https://www.alibaba.com/product-detail/Original-2-8-Touchscreen-50KHz-900MHz_62232701280.html https://groups.io/g/nanovna-users/message/658 Many thanks to Hugen and edy555 for all the effort they have put into creating this fantastic device. Jerry, KE7ER"