The Heil Parametric RX Audio System is an equalizer specifically designed to pull weak signals out of HF radio. The EQ and powered speaker are...
Reviewing & testing the Heil PR40, PR781 & PR77 Microphones. [MEDIA] Some great dynamic microphones available through Heil Sound. Bob, K9EID...
Bob Heil, K9EID, is no stranger to ham radio, as a pioneer in audio systems, not only for the rock and roll stars in the 60’s and 70’s, but for...