Eric Horwitz, KA1NCF, writes on the North Shore Radio Association mailing list:
We have a great speaker over Zoom: “An evening with Bob Heil, K9EID” [on February 21, 2023 at 7 PM].
1n 1966, Bob founded Heil Sound, experimenting with live sound systems and becoming the technician to several venues around St Louis. He has played organ at age 15 at the Fox Theater in St. Louis and in his tuning of organs “Learned to Listen.” He has been a vendor of sound systems for various musicians and music groups, He made the “Talk Box” for Peter Frampton, Joe Walsh and Richie Sambora. Bob entered the amateur radio market in 1970. He developed his HC series microphones intended for amateur use.