FT-817/857/897 filter board from SP6AB Artur
Dan KB6NU's article https://www.kb6nu.com/the-w3edp-antenna/
Battery spot welder:
Source for amplifier kits: W6PQL HF, VHF, UHF.
Getting started: Ch 17 in the ARRL handbook. No new book on amps in ~25 years. Read old engineering books from the 90s and old Motorola Amplifier books.
Vince’s POTA Activation in Glacier National Park MT while driving https://qrper.com/2023/08/ve6lk-makes-a-quick-trip-to-montana-o-a-ai7lk-day-1/