Another benefit and maybe the reason is that all aircraft working the same controller will hear all other aircraft - true party line! This is not possible with FM! Many times the heterodyne is so low in frequency as to not be heard. When I fly I would like to know what the other guy is doing & saying; especially at a busy airport. If we were going to change something - maybe SSB or vestigial SB would make sense if the bands get too crowded or the FCC wants to use the Aviation VHF & UHF comm. frequencies for more "Broadband". BTW the big guys already have digital communications in the cockpit at selected airports; with more coming on line.
73 George AI4VZ (Instrument Rated Private Pilot) -----Original Message----- From: Terry Schieler Sent: Wednesday, July 17, 2013 12:45 PM To: 'Ken G Kopp' ; elecraft@mailman.qth.net ; k...@yahoogroups.com Subject: Re: [Elecraft] OT: AM mode Correct, Ken. Then there is the "capture affect" of FM. Stronger FM signals could wipe out a transmission from another aircraft causing concerns. With AM, there is a greater possibility to pick out a weak signal in the presence of a stronger signal and avoid incidents. A real plus if you are flying the aircraft with the weaker signal. ;o) Terry W0FM -----Original Message----- From: Ken G Kopp [mailto:kengk...@gmail.com] Sent: Tuesday, July 16, 2013 2:31 PM To: elecraft@mailman.qth.net; k...@yahoogroups.com Subject: [Elecraft] OT: AM mode VHF/UHF aircraft radio has always been AM, and is likely / certain continue to be. Why? It's used world wide and discussions about changing it to FM have continued for years. The conclusion seems to be that there is simply too much usage worldwide and little reason to make the change. The cost to change to another mode would be horrendous! Of course manufacturers would -love- to see the change. There is usage of SSB on HF primarily ... but it's still "AM". (;-) 73! Ken - K0PP ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
