[Milsurplus] Aircraft comm/nav specs

[Jim Haynes]

-----Original Message-----
>From: Ken Kinderman <scr274 at gmail.com>
>Sent: Aug 24, 2010 2:14 PM
>To: milsurplus at mailman.qth.net
>Subject: [Milsurplus] Aircraft comm/nav specs
>
>What happened on Jan 1, 1997 to affect aircraft comm specs? Anything to do
>with acceptability of plain old AM as in ARC-3, ARC-1 operation? Something
>tells me it was related to minimum channel capacity?
>
Probably that's when the channel spacing was shifted to 0.25 KHz from 0.50 KHz