[Elecraft] OT: AM mode

[George Danner]

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 at mailman.qth.net ; KX3 at 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:kengkopp at gmail.com]
Sent: Tuesday, July 16, 2013 2:31 PM
To: elecraft at mailman.qth.net; KX3 at 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


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