[chirp_users] GMRS Channel Locking

Chris Romp chrisromp+chirp at gmail.com
Wed Feb 23 12:01:51 PST 2022

Right - I have other GMRS type-certified radios that let me put any
GMRS frequency into any "channel" on the radio. The ones that are
locked are difficult, because you can't (for example) have two
different "625" repeaters with different tones in memory.

So my hope is that we can -- at least for the RB26 -- get CHIRP to let
me program GMRS frequencies into any channel.  Currently I just load a
custom module into CHIRP to do it.


On Wed, Feb 23, 2022 at 11:52 AM Jim Unroe <rock.unroe at gmail.com> wrote:
> Nigel,
> On Wed, Feb 23, 2022 at 1:54 PM Nigel A. Gunn G8IFF/W8IFF
> <nigel at ngunn.net> wrote:
> >
> > OK Chris.
> > In most radios that come pre-programmed by the manufacturer, as opposed to the random channels that a manufacturer seems to leave in there after testing, I believe they are locked by the firmware in order to comply with a country's frequency allocations and get type approval in that country. Don't know if the FCC insists on that.
> >
> >
> This isn't my experience. The majority of GMRS radios sold by Chinese
> vendors/dealers are not locked in any way. It is only by use of the
> OEM CPS that the radio masquerades as being a frequency locked radio.
> Underneath, they are nothing more than your typical UHF (400-470+ MHz)
> handheld radio. The same can be true for several MURS, PMR and FreeNet
> models. I've even got one that is a dual-band model disguised as a
> GMRS radio. It seems that it isn't very hard to fool the FCC.
> Jim KC9HI
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