The Heathkit AA-151 is an amateur radio transmitter kit that was popular in the 1970s and 1980s. It was designed by Heathkit, a well-known company in the high-end electronics and kit market during that time. The AA-151 allowed users to assemble and operate a 28 MHz CW (Morse code) transmitter for various amateur radio bands using solid-state components. It featured a high level of functionality, including adjustable power output, filtering, and modulation. The kit was known for its high-quality construction and performance, attracting a loyal following among radio amateurs worldwide. Heathkit stopped manufacturing electronics kits in the late 1980s, but the AA-151 remains a sought-after collector's item amongst avid amateur radio enthusiasts today.