The maker built a cheap automatic antenna tuner that is capable of 350 watts, however, it wasn’t very good at tuning a wire antenna across the ham bands.
He is asking for help from the community to make it perform better.
The problem seems to be that the antenna wire’s length should be avoided as it can have extremely high impedance in multiple ham bands and be challenging to tune.
It is recommended to not have a random wire but to avoid those lengths.
In addition, there should be more RF protection on the power lines as RF beads and bypass capacitors could help.
The diodes in these units are often not the best and could be a problem.
Responding to his questions in the video, from the operator manual “antenna lead-in must not be longer than two feet” jumped out at the viewers.
That might be one source of his problem, especially since doubling the length of the lead in caused different channels to work/not work.
