I have two antennas in my station: a 10-15-20M yagi, and a loaded 40M vertical.
With the ATU built into my Kenwood TS-450S I can operate 80, 60 a and 30M with the 40M vertical too. Though, in 80M I have had very little luck being heard except for local stations.
Would it make a significant difference if I used an ATU at the base of my vertical, instead of tuning it with the built-in tuner?
I'm aware of the feedline losses due to mismatching, but I'm not sure how this translates to real world ability to transmit.
I'm an electronics hobbyist and I've been thinking of building a remote ATU: switchable inductors of 8-4-2-1-0.5uH (which should be able to make any combination of 0 to 15.5uH in 0.5uH steps), and a similar arrangement for capacitance, to build a L-network that should be able to tune the monopole to basically any frequency in the 80, 60, 40 and 30M bands. But I'm wondering if going through all this hassle would give me any significant advantage over just using my built-in ATU.