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Homebrew End Fed Half Wave Antenna

I need a portable antenna for the SW-3B that works 20 and 40 meters without a tuner. I built an end fed half wave using parts I had and put it into a small(ish) plastic snack container. The design is based on the HF Kits mini end fed antenna, but I've added a counterpoise terminal like the one used by QRPguys no tune antenna. SWR is workable on 40, 20, 15, and 10 meters. I cut the wire for 68 feet and started trimming in 6 inch increments until both 40 and 20 meters were under 1.5:1 swr in the CW portion of the bands. I set it up in the backyard, set up as a sloper with the transformer end at about 12 feet high sloping up to about 20 feet, 25 feet of RG-58 coax, no counterpoise. These are easy builds and inexpensive, if you can find all the parts. Here is the link to HF Kits and QRPguys. https://www.hfkits.com/build-instruct... https://qrpguys.com/qrpguys-mini-80m-...