There was a good post from March 2023, where there were many replies helping to differentiate between these varied radio communications; Link copied below.
These devices are very new to me.
I recently picked up some lower-cost versions of devices, a short-wave radio, a GMRS for the car, spare set of hand-held FRS, and a CB.
Some older used models can be found at lower cost.
Uses: For some it’s for communicating with family/friends outdoors, a hobbie, others find it helpful for road and weather conditions, or in case of an emergency.
At first glance, I found a general outline differentiating them, but I am not sure if it is correct:
CB’s do not require license, is not as prevalent as GMRS. CB is not heard on the same frequency as GMRS or FRS.
GMRS require FCC license, at $35 fee for a 10-year period. Got my license, but it was not easy navigating the FCC websites, I think I got lucky figuring it out. Many GMRS are those boxed shaped devices, used in cars (base stations/micromobiles). I installed one myself. GMRS are growing in popularity.
FRS are hand-helds, no license required, and might be compatible with GMRS devices. I am not sure if all FRS are compatible, but if the manufacturer is the same, that may help. The system I have is Midland, who said that all their GMRS and FRS are compatible with one another. FRS are sometime called bubble packs, similar to those you commonly see at big box stores like Walmart.
HAM: Require passing an exam, and licensure.
Short wave radio: No license needed. Receives broadcast (in bound only).
Antennas: When it comes to tuning them, it got too complicated for me, when I wanted simple as a newbie. Some makers say their brand GMRS’s and antennas are compatible and their antennas already come pre-tuned. I would not know, but found that helpful.
Power: In car boxed devices normally wire to your car’s battery. Too complex for my knowledge, so I made sure mine already came with the cigarette lighter plug and play option. Hand helds of course, use batteries.
Suggestions: I preferred the devices which included a weather channel, weather alert feature, and self automatic scanning for the most clear and or stations which have activity on them.
Repeaters: Is a device which helps increase the distance one can cover. I saw some for sale, but they were too expensive for me. I found it complicated to obtain access to someone’s receiver, looking for tips.
I know many of you are experts in this field, and other have helpful experience. So, please share any knowledge or questions to “the group”.
Link to: