The GMRS full power channels are 462.550, 462.575, 462.600, 462.625, 462.650, 462.675, 462.700, 462.725. Deviation is +\- 5KHz. Power output 50 watts + antenna gain, if any.
The "interstitle" channels like 462.5625 are used by the FRS "kiddie-talkies". 500mW power, +\- 2.5KHz deviation, no external antennas. Whoever thought that arrangement up had no comprehension of how a radio works. If I were going to try to use GMRS today with the prolifiration of kiddie-talkies out there I would limit my receive radio bandwidth to the 12.5K setting to cut down on the adjacent channel junk, but that means that any radio normally set for GMRS at 25KHz bandwidth will sound crappy. Thank the FCC and the radio manufacturers for killing off a good service. Milt N3LTQ ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <Repeater-Builder@yahoogroups.com> Sent: Friday, January 25, 2008 10:16 AM Subject: Re: [Repeater-Builder] Re: Gmrs Repeater >I was describing the many bandwidth options offered in many new PC >programmable commercial two-way radios today. > Maybe we're looking at two different things but I see GMRS channels as > 12.5Khz apart from each other. Channel one for example is 462.5500 where > channel two is 462.5625. > Gary > ---- wd8chl <[EMAIL PROTECTED]> wrote: >> [EMAIL PROTECTED] wrote: >> > Paul, the underlying and unexpected contridiction here was not >> > between 15Khz vs. 20Khz channel spacing but instead between 20Khz and >> > 25Khz channels more commonly found on UHF which as you know is where >> > GMRS resides. Historically there's more than enough guard between >> > channels to compensate for slight overdeviation or slight drift off >> > channel but now everybody wants to tighten things up so new gear is >> > coming stock with 4Khz max dev associated with 20Khz channels vs. >> > 5Khz dev which we've all enjoyed for years on 25/30Khz channels. >> > Seems a bit odd of them to expect no interference problems from >> > +/-5Khz peak dev on a 20Khz max channel but it is better for us users >> > to have the option I suppose. Gary >> >> >> Huh? GMRS channels are still spaced 25 KHz apart. If someone is making >> radios with 20KHz spacing, they are illegal-in the US... >> >> >> >> >> >> Yahoo! Groups Links >> >> >> > > > > > > > Yahoo! Groups Links > > >
