I can't take credit for building it from scratch, but I picked up a 20M dipole on ebay and added a 1:1 balun underneath - fed with 25' RG-8U Coax. Adjusted ends as best I could to achieve roughly 1.24:1 on most of phone band. Telescoping fiberglass mast. Base is PVC pipe secured guyed with straps. I had the center insulator at 19 ft above ground and the apex angle at 90 degrees. I reached Costa Rica and Nova Scotia from coastal South Carolina with 6 watts. I wish I could have had this more in the open but my lot has obstacles. I used bungee cord from the end insulators to paracord secured to tent stakes in the ground This is a pretty easy set up. First time up took a little time and practice, but it comes down in 5 minutes, really easy. Lightweight and portable. It's good for a few hours, maybe a weekend if you keep an eye on the base and the telescopic sections. I wouldn't leave it out in bad weather. I am going to try putting the antenna at 21' or 22' next time; that's about as high as I can go before adding more coax which I don't care to do. I would love to hear your thoughts and suggestions about any room for improvement you see.