In 1929 , it became KGGC and , in 1938 , it became the first local station to use the KSAN call letters .
The original KSAN ( not KSAN ( FM ) , KYLD or KSOL ) was born in June 1925 as KGTT .
In 1929 , KSAN became KGGC and , in 1938 , KSAN became the first local station to use the KSAN call letters .
The original KSAN ( not KSAN ( FM ) , KYLD or KSOL ) was born in June 1925 as KGTT .