If you are referring to the 2.5 KHz steps - that's necessary so the radio can be programmed on whatever frequency is necessary due to the variety of band plans and channel spacings. That doesn't mean that in any one geography there is any intent to have adjacent channel operations 2.5KHz apart.
--------------------------------------------------------- --- In [email protected], "afa5tp" <w7...@...> wrote: > > Hello Group, > > I may be confused....so please set me straight. > > I thought that the new "Narrow Band" was the narrowing the channel spacing > from 25kHz. to 12.5kHz, and of course, knocking down the deviation from 5 > kHz. to 2.5 kHz. > > On the subject of affordable "Narrow Band" gear....I highly recommend the > Icom F-121 (VHF), or F-221 (UHF). These radios feature PC programming, and > are wide/narrow band selectable per channel. Price is about $275.00 for the > eight channel version. There is a 128 ch. version available for more $$$$! > > I guess I am "Waiting in the Wings", like everyone else.....! > > TIM W7TRH/AFA0TP Wa. > > > > --- In [email protected], wd8chl <wd8chl@> wrote: > > > > James Delancy wrote: > > > > > > Glad to see my posts are making it. In the commercial and public safety > > > world > > > (Motorola style primarily as I am not entirely up on all the others > > > except to > > > find that the Kenwood, Icoms and Vertex stuff was slow to adopt 2.5 KHz > > > steps), > > > if it accepts 2.5 Khz steps, then you can select narrowband and it will > > > narrow > > > up its IF's for receive, boost the audio on RX and narrow down the > > > transmit > > > accordingly. All of the ham stuff that I have now will do narrowband, > > > but most > > > will NOT do a 2.5 KHz step. Does that help clarify it ;) > > > > > > James WJ1D > > > > Again, as of about 13 years ago or so, the FCC mandated that narrowband > > modes be included in radios for Part 90. The 2.5 KHz steps issue is not > > related at all. > > >
