How it all began 1957
In 1957 VY2CM Copthorne (Cop) Mackdonald got the idea while thumbing through the Bell System Tecnical Journal. He used a “P7” long persistence phosphor radar type display tube.
1958 Won the national first prize competition in American Institute of Electric Engineers(IEEE1
8 -12- 24- 36 sec BW pictures.
1997 640 x 480 with milions of collors .!!