Hi! I did some googling on low band PA's using these SMPS fets. I am looking for a design for 160 and / or 80M. I could not find any serious PA's. There are several around for 138 and 500 Khz. Maybe I used the wrong search words, not being a native English speaker. I would like to hear about experiences and hints in form of a link would be fine. Thank you! 73 Geert PA3CSG