On Thu, 03 Jun 2004 00:26:55 -0700, Frank Gilliland
wrote:
Are you sure about that? I thought they used NBFM as far back as the
Mercury program, but I could be mistaken.

Frank,here are the frequencies used during the apollo missions

227.5 - AM - Apollo 6
230.9 - AM - Apollo 5
237.8 - AM - Apollo 5 / 6
241.5 - AM - Apollo 5
247.3 - AM - Apollo 5
257.3 - AM - Apollo 5
259.7 - AM - Space Shuttle Primary / Apollo 7 - 12
296.8 - AM - Space Shuttle Backup / Apollo 7 - 12