[AMRadio] Phone band expansion


david knepper collinsradio at adelphia.net
Thu Oct 12 08:10:58 EDT 2006


It's about time!


Dave, W3ST
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----- Original Message ----- 
From: "Donald Chester" <k4kyv at hotmail.com>
To: <amradio at mailman.qth.net>
Sent: Thursday, October 12, 2006 2:45 AM
Subject: [AMRadio] Phone band expansion


> Up to an extra 150 kc/s for phone on 75 m for Extra class.
>
> 75m Phone Allocations
>
>
>             General      Advanced      Extra
>
> Current      3850-4000   3775-4000   3750-4000
>
> New          3800-4000   3700-4000   3600-4000
>
> Increase         50           75        150
>
>
>
> 40m Phone Allocations
>
>              General      Advanced       Extra
>
> Current      7225-7300    7150-7300    7150-7300
>
> New          7175-7300    7125-7300    7125-7300
>
> Increase        50            25           25
>
> Much better than anything I had anticipated, but we are still left with a 
> cumbersome matrix of subbands based on operator class combined with 
> emission mode.
>
> Considering the relief in congestion we have already experienced due to 
> the general decline in amateur activity in recent years, there should be 
> plenty of room for all on 75m, without the griping about AM "taking up too 
> much room on the crowded band."  Of course, if the FCC eventually 
> eliminates the code requirement, expect an initial spike in activity as 
> hoards of no-code Techs upgrade, but after the initial spike I predict a 
> return to stagnant growth.  There should still be plenty of room for AM 
> activity.
>
> Once the expansion goes into effect, we should immediately commence AM 
> activity on the new frequencies, including the 3600-3700 kc/s Extra 
> segment.
>
> I have looked over the R & O, but I am not sure if it means that 3600-3700 
> is restricted to Extra class for all modes, or just that Extras can now 
> use phone in the segment.  How this will affect non-voice licence class 
> restrictions is not made entirely clear in the FCC document:
>
> "12. Regarding the division among license classes of the spectrum on which 
> we today
> authorize phone emissions, we adopt the Commission's proposal to authorize 
> stations of General
> Class licensees to transmit voice emissions in the 3800-4000 kHz frequency 
> segment, thereby
> increasing by 50 kHz the spectrum for voice communications by these 
> stations. Because we
> have decided to authorize more 75 m spectrum for voice communications than 
> was proposed in
> the NPRM, we also authorize stations of Advanced Class licensees to 
> transmit voice emissions in
> the 3700-4000 kHz frequency segment, thereby increasing by 75 kHz the 
> amount of spectrum for voice communications by these stations. We also 
> authorize stations of Amateur Extra Class
> licensees to transmit voice emissions in the 3600-4000 kHz frequency 
> segment, thereby
> increasing by 150 kHz the spectrum authorized to these stations for voice 
> communications. In
> the 40 m and 15 m bands, we adopt the Commission's proposal to authorize 
> stations of Amateur Extra and Advanced Class licensees 7125-7300 kHz, 
> stations of General Class licensees 7175-7300 kHz, and stations of General 
> Class licensees 21275-21450 kHz for phone communications."
>
> If Generals and above will still be able to use 3600-3700 for non-voice 
> modes, expect digital modes to continue to operate in this segment.  I 
> suspect that may be the reason such a big hunk was set aside for Extras - 
> to limit phone activity in that region of the band so that some of the 
> digital stuff can continue on those frequencies.
>
> Although the thinking of government agencies is extremely unpredictable, 
> this doesn't look well for the ARRL's bandwidth proposal.  If the FCC were 
> seriously considering limitations by bandwidth any time soon, it is 
> unlikely they would have gone to all the trouble to work out this plan, 
> only to have to revise it in the near future to accomodate 
> subbands-by-bandwidth.
>
> Looks like we'll soon be able to join the Canadians in their "AM Window" 
> on 3720.
>
> The change is expected to go into effect sometime in mid-November.
>
> http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-06-149A1.pdf
>
> _______________________________________________________________
>
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