Dr. Jack Mandelman, K1VT, was my guest in 2018, after meeting him on a DMR talk group.  As my head is down in preparation for the upcoming QSO Today Academy Event, I wanted to bring back this great interview with Jack.  Jack is on the short list for holding the most patents, over 700 Worldwide, in the area of semiconductor physics, while at the same time a successful ham radio operator working DX and CW.  Jack is exploring   satellite communications and DMR. K1VT shares his ham radio story episode of QSO Today.