AFRS Radio is owned and operated by the United States government and operates on an assigned carrier frequency of 540 at 749 megahertz.

10 seconds sound clip from the Good Morning, Vietnam movie soundboard.

You can hear this line at 00:03:51 in the Blu-ray version of the movie.

Quote context

[...]

- Actually, what I am, sir, is your Armed Forces Radio Saigon assistant who's in charge of orientation and billeting of enlisted personnel and company clerk.

- I'm impressed.

- It's already started.

- I understand.

- This is AFRS, Radio Saigon.

- AFRS Radio is owned and operated by the United States government and operates on an assigned carrier frequency of 540 at 749 megahertz.

- Jesus, that guy's as boring as whale shit.

- Not really.

- See, the purpose is to inform you as to the radius of the radio waves.

- Mantovani? They play Mantovani to insomniacs who don't respond to strong drugs.

[...]