I made a custom doublet antenna for use with an outboard ATU using 16m of 450 ohm ladder line and 22m each leg of DX50 wire and a custom doublet centre. This is the short, edited video of the long-form "AMSR" style video uploaded here: https://youtu.be/s4WzIgCvAbQ
More videos:
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7zFt6NV9fnnde2lP11fUTQ8 Antenna Modelling
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7xtKohJRipVLQ6rxYzRP8eq Tips and Tricks
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7xwhA0Msm_bNT4CQ_Bj5D4c Antennas
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7wc6svNLY7IDthw1YCFNq9W Live Streams
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7w9dp9Eqg_UhamrY5Ck3dyX My Stuff
▶️ https://youtube.com/playlist?list=PLcC64tNkZB7xvc3rHlpqqCkiBdAzYe8cf Ham Radio Training