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What's wrong with that?

The GM-30 has an SMA-F fitting on the radio, which requires an antenna with an SMA-M connection. The NA-771G from Buy Two Way Radios is available in both SMA configurations, plus BNC, and is specifically tuned for GMRS frequencies. Most Baofeng radios require antennas with the SMA-F connection, so if you order something different that doesn't specify the connector, it probably won't work on the GM-30. There is also a shorter NA-701G antenna you can buy, but some reviewers have said it doesn't work much better than the stock antenna. I haven't tried it, so I can't comment on that aspect of it from my own experience. It has the advantage (as does the stock antenna) of being less intrusive than the 771G due to its shorter length. If you're going to use the radio in a vehicle, I'd recommend a magnet-mount (or permanent mount) external antenna for better performance. Even a cheap, but properly tuned, mag mount will improve performance substantially over using a whip attached to the radio inside the vehicle.

Enough. You have 272 posts on here... do you ever read what others have said? You certainly can't be that obtuse. The guy has a for profit business hosting GMRS repeaters that you have to pay a fee to access. He has a list of at LEAST 20 repeaters on this site through out central and southern Ohio. Some of them are at tower sites that I can say for a fact he has ZERO access to. And I have been in them and NO GMRS equipment exists at these sites. And when I say business, I mean established business with a State of Ohio issued business license, tax ID number and these documents indicate it's a for profit business. Which if you had read the rules pertaining to GMRS and fee's you would KNOW that's illegal. Now, how profitable his business is. How many actual subscribers he has. The real number of repeaters he has on the air. I have zero clue on any of it, and don't care. But specifically to the "whats' wrong with that?" question.... it's against the FCC rules. Using DMR or ANY digital modulation (MDC and other positoning data transmissions are NOT digital modulation) is against the regulations for GMRS. And since I know someone will disagree, you are allowed short data bursts for ID and GPS location, but they are analog modulation of digital data, not a digital modulation as defined by the emission designation . And I am thinking that we need to get this thread back to the original topic of the tower build out.

And subsequently, if you want to use a different repeater with different access tones, you must reprogram the channel and can't add a new one.

What are you looking for? Study materials? General discussion? Radio Reference has a pretty solid Amateur Radio section, and the one on this site at the bottom isn't too bad either.

This is what I use https://www.amazon.com/gp/product/B01BD6DRI6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 with these label cartridges https://www.amazon.com/gp/product/B074JZ6NWV/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 I label each HT behind the battery, and each battery gets numbered. Cables get it either on the plug, or right next to the plug on the cord, and wrapped in packing tape.

The 778 is marketed as a dual-band ham radio, so it has 2m and 70cm capabilities from the start. It is not type accepted for GMRS to the best of my knowledge. On the 779, it is marketed, and type accepted, as a GMRS radio, and the factory default is that it only transmits on GMRS frequencies. It can be reconfigured to a dual-band ham configuration, which also allows it to transmit on GMRS and MURS frequencies, although using it in this way may violate FCC regulations. I believe there is a stipulation in the regulations that says a GMRS radio cannot work on other services like the amateur radio service.

When a comment is underlined, it usually means it is a link you can click on: Nagoya 771G in this case it takes you to BuyTwoWayRadio more later

To create groups you will need the software. But you can select the ‘ALL’ scan group on the radio and remove the channels you don’t want scanned. Each channel has a setting that allows you say if you do or do not want it scanned. No software needed for that. Sent from my iPhone using Tapatalk

Does this video help?