Here's some more excitement to add to the existing harmonics and splatter on HF ... https://www.aliexpress.com/item/MINIPA-Assembled-100W-SSB-linear-HF-Power-Amplifier-with-heatsink-For-YAESU-FT-817-KX3-cw/32846358133.html?spm=2114.10010108.1000023.13.35204554jWs776 73, KD4E