Nothing to do with Chirp. The radio's firmware doesn't allow them to be changed.
> On 23/02/2022 12:44 Chris Romp <[email protected]> wrote: > > > Thanks, Jim, for that info. I've reached out to Retevis to see if > they have any input. Would it basically be a requirement for CHIRP to > support assigning any GMRS frequency to any channel for Retevis to > change their OEM software, even if the radio supports it? > > Thanks again, > Chris > > > On Mon, Feb 21, 2022 at 6:08 PM Chris Romp <[email protected]> > > wrote: > > > > > > Hello, > > > > > > I have a question about how CHIRP handles GMRS radios, e.g. BTech GMRS V1 > > > and Retevis RB26. I've noticed that CHIRP enforces that GMRS channels > > > follow the FRS channel number and frequency pairings, e.g. Channel 1 is > > > 462.5625, Channel 18 is 462.625, etc. I've been trying to find in the > > > FCC regs if this mapping is a requirement of GMRS operation. The only > > > place I've found the channels spelled out is on 47 CFR Part 95B ?95.563 > > > "FRS Channels" (link), but GMRS seems only to specify the frequencies and > > > bandwidth which may be used via Part 95E ?95.1763 "GMRS Channels" (link). > > > It's entirely possible that I've missed the clause requiring this > > > mapping, and I am not a lawyer, so apologies if I've overlooked it. > > > > > > When I am programming a GMRS radio, I don't always want what my family > > > refers to as our "channel 1" to be 462.5625. Likewise I may want to set > > > up different repeaters that may use the same frequencies, but different > > > tones (especially on radios where I cannot edit the tone from the radio > > > itself) I am able to program the RB26 to accept an alternate GMRS-legal > > > frequency with a little trickery, so there does not seem to be a firmware > > > restriction enforcing this and it hasn't bricked my radio (yet). > > > > > > Would it be possible for CHIRP to accept GMRS-legal frequencies in any > > > channel slot, and not require the FRS channel-frequency mapping? > > > > > > Thank you, > > > Chris Romp > > > > The BTECH GMRS-V1 channel assignments are in firmware. Even if CHIRP > > would let you put in different frequencies, it wouldn't make any > > difference. Channel 1 will always be 465.5625 MHz. > > > > The Retevis models are programmed to match how the OEM software > > behaves. Some of the newer Retevis models let you program the GMRS > > frequencies in the radio however you please. > > > > Jim KC9HI > _______________________________________________ > chirp_users mailing list > [email protected] > http://intrepid.danplanet.com/mailman/listinfo/chirp_users > This message was sent to Nigel Gunn, W8IFF at [email protected] > To unsubscribe, send an email to > [email protected] > To report this email as off-topic, please email > [email protected] Nigel A. Gunn, ///shoulders.outwards.resolutions tel +1-937-971-0366 Amateur Radio G8IFF W8IFF and GMRS WRBV701, e-mail [email protected] www http://www.ngunn.net _______________________________________________ chirp_users mailing list [email protected] http://intrepid.danplanet.com/mailman/listinfo/chirp_users This message was sent to [email protected] at [email protected] To unsubscribe, send an email to [email protected] To report this email as off-topic, please email [email protected]
