Jack meets J. Robert Oppenheimer

J. Robert Oppenheimer ca. 1944 when he was director of the Los Alamos National Laboratory

Jack says he met Oppenheimer when he was a physics student at UC Berkeley and Oppenheimer was a professor there.  Oppenheimer was at Berkeley from 1929 to 1942.  He would have been 37 when he left Berkeley to direct the Los Alamos National Laboratory. Although Oppenheimer was not a radio ham, Jack says that the ham radio operators were interested in the Cyclotron which used the same frequencies as were used in radio. Wikipedia says that the first cyclotron was manufactured by Ernest Lawrence of Berkeley in 1932.