So I’m active on Facebook Amateur Radio groups. And one guy lamented that they couldn’t find any antenna tuners for the 6m (50MHz) band.
I stated you could make your own. All it is is a couple of air variable capacitors and a coil between the input and output of the device. In essence you’re matching the 50 ohm impedance of your radio to the antenna. This impacts SWR.
If you’re interested, AA3SJ (Another interesting call sign. I like mine better though, KD1S, short, sweet and to the point!) has an interesting comparison of T style and Pi style matching networks.