[K3PZN-List] New NBFM spacings & BW?

[Dan Blasberg]

Steve,

The P25 and MotoTRBO repeaters are more prevalent than just Motorola  
employee areas.

There is a UHF P25 amateur repeater in Frederick, MD and a UHF  
MotoTRBO amateur repeater here in PG county.

Just FYI...

Dan
KA8YPY

On Dec 2, 2010, at 12:12 PM, Steve wrote:

>
> Of course there's more to this than just turning down the deviation.  
> Public safety and commercial  use digital modulation P25 variants to  
> reduce the bandwidth. Phase II P25 is also in the works and it will  
> reduce bw by half again (6.25KHz). Following this path means all new  
> hardware for base and individual users. There are amateur P25  
> systems around though in major Motorola employer areas of the country.
>
> 73;
> Steve
> NY3A
>
>
>
>
> Dec 2, 2010 11:46:11 AM, k3pzn-list at mailman.qth.net wrote:
>
>
>
> I saw this article as well. Commercial and Public safety moving to  
> 2.5KHz has been in the works for a long time.
>
>
>
> That doesn't have any bearing on amateur regs and I've seen nothing  
> that would indicate a move to require 2.5KHz on amateur frequencies  
> and such a rule would be a significant reversal for the FCC that has  
> explicitly rejected regulation by bandwidth for amateur bands.
>
>
>
> As for the FRC
>
>
>
> Having 1st hand knowledge of that group from my time in FL as a  
> repeater owner/trustee my personal take is that the 2.5KHz proposal  
> originated from the Miami/Dade area where there is a large  
> population center that has no available 2m (likely 70cm as well by  
> now) pairs. This would allow the FRC to coordinate more repeaters in  
> the heavy population centers where there has been a long waiting list.
>
>
>
> I don't think the cent and north FL FRC delegates would be inclined  
> to support the proposal since they don't have the same pressure for  
> pairs that south FL has and it would upset a lot of repeater owners.
>
>
>
> In addition unless you have a radio that can adjust the bandwidth in  
> s/w once you hardware modify a user radio for 2.5KHz you won't be  
> able to use a 5KHz machine effectively so now you've broken  
> compatability between users and the some (if not most) of the  
> repeaters in the area. I'd expect opposition from ARES/RACES on  
> thses grounds - we've just taken the universal 2m radio that every  
> ham has and is the most widely interoperable piece of equipment in  
> the go-kit and made it much less useful.
>
>
>
> If it were adopted I would also expect an eventual revolt from many  
> long established repeater owners. There isn't any requirement to  
> have your repeater coordinated, and many would just continue to  
> operate as-is which would then create a mess for anyone trying to  
> coordinate a new 2.5KHz repeater. FRC couldn't just ignore a now  
> uncordinated repeater that has been on the same freq same location  
> for 25 years and coordinate someone new down the road - I don't  
> think that would fly with the idea of the coordinator doing their  
> job to prevent interference.
>
>
>
> Just my $0.02.
>
>
>
> Andy
>
>
>
>
>
> ----- Original Message -----
> From: "Philip Karras"
> To: "ccarc"
> Sent: Thursday, December 2, 2010 8:53:24 AM
> Subject: [K3PZN-List] New NBFM spacings & BW?
>
> Has anyone read/heard/know of this?
>
> I was sure I'd read about this in one of my magazines (print or  
> online) but can't find it now, but if I remember correctly the FCC  
> has mandated a closer channel spacing & narrower bandwidth on the  
> NBFM presently used for business & public safety NBFM bands.
>
> Also in the article I read the Florida Ham Repeater Coordination  
> Group was proposing the same kind of action by something like 2015?  
> for all repeaters, I think they proposed a grand fathering in up to  
> 2020 but after that no wider NBFM would be re-coordinated  
> automatically & would have to give "good" reasons for wanting to  
> stay at the +- 5 KHz BW & not move to the +-2.5 KHz proposed new BW..
>
> Is this for real or did I dream this one up?
>
> tnx & 73 de ke3fl
> Phil
>
>
>
>
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