This is an old Astatic JT-30 Desk Microphone that I restored back around 1995. I have adapters wired that will connect this to the Heathkit Twins, to my Yaesu FT-901, and my Icom 756. It has a very 'bright' sound to it, and I use it often on my Heathkit 301/401 twins. This one was built sometime in the early 1960's, based on the silver border adhesive label with stamped “JT 30”.
