My dad went to school at UC Berkeley with Bob Melvin. Bob Melvin built a black & white TV camera at the end of 1948 and put it on 420/450 MHz ham band in early 1949. My dad built a receiver and received TV pictures from Berkeley at his home in Oakland, CA. Dad later build a camera and had it on the air for a short time.
( See June 1950 QST)
Here are a couple pictures of the TV endeavor.