What was found
DURING CLIMB, HANDED OFF TO CENTER, NO JOY ON COM 1. COM 2 WAS ON MEL. BACK TO PREVIOUS FREQUENCY, ASKED FOR ALTERNATE OR STDBY FREQ. SOMETIMES, I COULD GET THE STD BY FREQ. EXPERIENCED NO COM FOR 4 TO 5 MINUTE PERIODS. REPLACED FAULTY COAX CONNECTOR AT ANTENNA FOR COMM 2, COMM 1 OPS CHECKS PERFORMED, NO FURTHER ACTION NEEDED.