While cleaning out a closet recently I discovered an old Shure 545S microphone that was used during my younger
years in a rock band. This classic dynamic microphone features a built-in stand mount and was the precursor to
the popular SM-57/58 series now in production. I decided to place this microphone into amateur radio service
and proceeded to order a desk stand with room for a PTT switch. This project was later expanded to include a
filter similar to my Yaesu MD-100A8X desk microphone with the circuit powered from the radio’s microphone voltage.
