When I first got my Tech+ upgrade in 1996, I needed an antenna for my HTX-100 at home. Went to the hardware store and bought 2 20 ft. long pieces of 1/2" galvanized conduit. Cut them down to size for 10 meters. Put it on a wooden dowel about 10' off the ground and ran it vertical. Worked all over the states and So. America, and even got Japan on that thing running a whopping 25 watts. It's amazing how you can make things that radiate for not much $$$.
Sometime thereafter, I got an A-99 vertical and got it up at the same QTH up 20' with swaged antenna masts. When I got back into the hobby in 2020, still had that in the garage at the new QTH, threw it up on a 15' mast and got it working, with internal tuner on the TS-440S on 15/17 and 10m. replaced with the Comet CHA250B up 35' which does nicely on 80-6. but take the A-99 out to our "Hams in the (non POTA) Park" get togethers and it still does the job.
Speaker wire, Twin Lead, lamp cord; pretty much any wire will make an effective radiator of RF!