|[AMRadio] Re: SpaceShip One uses AM|
Robert A. Poff
wb3awj at blazenet.net
Wed Oct 6 10:34:50 EDT 2004
But of course don't forget that all the ATC over the ocean communications is
----- Original Message -----
From: "Mahlon Haunschild" <mahlonhaunschild at cox.net>
To: <amradio at mailman.qth.net>
Sent: Wednesday, October 06, 2004 7:05 AM
Subject: [AMRadio] Re: SpaceShip One uses AM
> Fun fact: All aviation voice communications is AM, albeit VHF.
> SpaceShip One isn't unique.
> It's AM because the blocking effect that FM exhibits is considered
> unacceptable. With AM, if two stations interfere you can usually hear
> both signals to some degree through the heterodyne. With FM, one
> station would block the other. The flight safety boffins wouldn't like
> SSB of course would be too labor-intensive for aviation service.
> Mahlon - K4OQ
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