[arm-allstar] picking frequency

[C B]

47cfr 97.301(m) In the 70 cm band:(1) No amateur station shall transmit from north of Line A in the 420-430 MHz segment. See §97.3(a) for the definition of Line A.(2) Amateur stations transmitting in the 420-430 MHz segment must not cause harmful interference to, and must accept interference from, stations authorized by the FCC in the land mobile service within 80.5 km of Buffalo, Cleveland, and Detroit. See §2.106, footnote US230 for specific frequencies and coordinates.(3) Amateur stations transmitting in the 420-430 MHz segment or the 440-450 MHz segment must not cause harmful interference to, and must accept interference from, stations authorized by other nations in the fixed and mobile except aeronautical mobile servicesFor exampelKNID397 - ERIE, COUNTY OF has frequencies in the 420 - 430 band



      From: Doug Crompton via ARM-allstar <arm-allstar at hamvoip.org>
 To: ARM Allstar <arm-allstar at hamvoip.org> 
Cc: Doug Crompton <wa3dsp at gmail.com>
 Sent: Thursday, March 28, 2019 9:59 AM
 Subject: Re: [arm-allstar] picking frequency
   
Ron,

 I am not aware of any US reassignment of the 420-430 part of the band. ITU
region 2 has that entire spectrum. We are however secondary to the band to
the military and in some areas near military installations power is
limited. Around PAVE-PAWS military radar sites there is generally a 100
mile 50 watt limit.  I know there are coastal sites in MA and CA but not
aware of other states.


*73 Doug*

*WA3DSP*

*http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*


On Thu, Mar 28, 2019 at 10:44 AM "Ron Gilson via ARM-allstar" <
arm-allstar at hamvoip.org> wrote:

> Depending upon your location, some areas have reallocated the 420 to 430
> part of the band to public safety.  You might consider using a simplex
> channel, narrow band and 12.5 khz between the normal channels.  An example
> would be 431.0625mhz.  Commercial two way has been doing this for 20+
> years.
> WA2WWK  Ron
>
> On Wed, Mar 27, 2019 at 10:22 PM "Tony Ross via ARM-allstar" <
> arm-allstar at hamvoip.org> wrote:
>
> > On 3/27/19 5:50 PM, "Fred Hillhouse via ARM-allstar" wrote:Greetings,
> > > I am interested  in hearing how someone picks the frequency or
> > frequencies
> > > of an attached radio.
> > >
> > > I picked up a Baofeng BF-888 for the purpose of adding to my node.
> >
> > Keep the Tx power at the lowest level. Choose a frequency and monitor
> > for several days to determine local traffic. Consider your mobile
> > operations on your chosen frequency and listen elsewhere before Txing.
> > Use a PL tone. Review Part 97 §97.101 et.al..
> > _______________________________________________
> >
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> >
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