Complex sentence: Today, only a minority of hams exclusively operate completely homebrew or kit-built amateur stations, however, there are many new ham radio kit suppliers, and the "art" of homebrewing is alive and thriving.
Split into simpler sentences: Today, only a minority of hams own and operate completely homebrew or kit-built amateur stations. However, there are many new ham radio kit suppliers, and the "art" of homebrewing is alive and thriving.