My 80-10m efhw shows an swr less than 2 at 80m and 1.5 or less on the harmonics. and starts at 10ft up to 25ft in height. I use a homemade 56:1 unun. I have a choke on a 3ft jumper under the 56:1 unun and a 33ft counterpoise wire which am going to change to a 66ft 1/4 wave at 80m and bring down the swr even more on 80m. And not rely on the coax for the counterpoise being it is only 50ft long. I also run a choke at the shack end of the coax. I am also going to shorten the132ft element to bring several bands into the center of the bands and adjust the upper band tuning coil to keep the upper bands down in their respective bands. I could just eliminate all the extra stuff by cutting the main element in half and put a 300 to 500 pf high voltage cap in the middle and call it a day.
My 80-10m efhw shows an swr less than 2 at 80m and 1.5 or less on the harmonics. and starts at 10ft up to 25ft in height. I use a homemade 56:1 unun. I have a choke on a 3ft jumper under the 56:1 unun and a 33ft counterpoise wire which am going to change to a 66ft 1/4 wave at 80m and bring down the swr even more on 80m. And not rely on the coax for the counterpoise being it is only 50ft long. I also run a choke at the shack end of the coax. I am also going to shorten the132ft element to bring several bands into the center of the bands and adjust the upper band tuning coil to keep the upper bands down in their respective bands. I could just eliminate all the extra stuff by cutting the main element in half and put a 300 to 500 pf high voltage cap in the middle and call it a day.