dosw

The GMRS version of the 5RM series is the UV-5G Plus. Type-approval aside, the 5RM variants (with the exception of the UV-5G Plus) cannot be set to power levels below about 2w. That makes them incapable of meeting the technical requirements for operating on GMRS/FRS channels 8-14, since those channels are supposed to be constrained to 0.5w or less. Aside from that they can be correctly configured for 1-7 and 15-22, though they would still not be type-approved, so still in violation of the FCC rules, which not even the FCC has enforced against individuals historically. It would be impossible to distinguish a 5RM series configured technically correctly on channels 1-7 and 15-22 from a UV-5G Plus. Nobody could tell the difference. And on 8-14 it would be hard to know, though transmitting at 2w when you're supposed to stay under 0.5w is more likely to interfere with nearby repeater mains, so not a good practice. <update> If there is now a 5RM GMRS variant, that is probably going to be something very similar to the UV-5G Plus. And it may even be a type-approved radio. You could look it up in the FCC filing but it's a lot of work to find, and ultimately not worth the bother.

This is a topic you could search for hours on and not come up with a clearly definitive answer. In fact, there's almost no argument, even. The advantages and disadvantages of each are so minor people don't really seem to be all that passionate about it. CTCSS will behave with older equipment that doesn't support DCS. But who are we protecting? There aren't a lot of people operating 20 year old blister pack GMRS radios lacking DCS support on repeaters. Both are subaudable tones or sequences that have to be filtered out by the radio's high pass filter. Both have different reasons for behaving a little oddly at fringe-reception areas. DCS *may* take a little longer for the sequence to be transmitted completely enough for a radio to open squelch, but we're talking tenths of a second at most. CTCSS may be a little more crowded (you may have a slightly harder time finding a channel and tone pair that isn't in use). But the fact that we have both systems really is a product of the evolution of marketing bullet points from vendors. One or more vendors claimed they had a new and improved system, and they pushed it to the point that it gained adoption. But the fact that DCS and CTCSS have continued to co-exist for decades, filling the exact same purpose, without a clear winner pushing the other out of the way kind of indicates there's not a clear winner.

GMRS repeaters have the same exact propagation characteristics as 70cm. I'm aware of this as you are. But 70cm doesn't have a prohibition against linking. The point I was making was that it's possible the OP was hearing a 70cm repeater that was legally linked -- a very common practice -- as opposed to hearing a GMRS repeater that is illegitimately linked -- a much less common practice nowadays.

Are you sure you were listening on GMRS frequencies? Could the radio have been set to pick up 70cm amateur? It's a lot more common to find repeater networks in the amateur bands. It still happens in GMRS despite the FCC clarification. But if you were picking up 70cm amateur it would be less surprising.

We all value knowledge and experience here, but the way you're treating newcomers is out of line. Everyone starts somewhere, and being dismissive, impatient, or outright rude doesn't make you look more knowledgeable—it just makes this community less welcoming. If your goal is to actually help people learn and grow, then your attitude needs to reflect that. Otherwise, you're not building anything—you're just gatekeeping. You were new once too. Try to remember that.

Just following up with a few pictures and thoughts: 1R-TZx2sXZtB5VeoNzVYUUdh537kbVpeM 1R4AwUegDgP7ah-gv4selGUVxdnPf5BFR 1QvOYWltKxpcItGcxLZCTJskw-9aolGER One is the old Bronco with an MXTA26 antenna. Inside is an RA-87 mounted under the driver's side console above the driver's right knee. Plenty of room there. The other two are the newer F150. It's in pretty good shape, so I'm a little reluctant to make an amateurish attempt at routing wiring through the headliner to set up a rooftop drilled-through NMO mount. Yet that's probably the best option. I'm thinking I might get in touch with an audio installer and let them go at it. I think the roof is probably my best option, though as you can see from the picture I have a sun roof, and I'm not sure how far back the window equipment goes. Thus I don't know how far back I'll have to put the NMO mount to be out of the way while still having some ground plane available. Inside, things are pretty tight. I like the idea of putting a radio under the center console, and then running the head unit up to the sunglass holder overhead, OR to a seat mounted bracket.

Yeah, the radio doesn't get the love that some of the Wouxuns and other fairly popular models get. But it's really pretty solid. Very close to the full 40w across the GMRS range (within, say, 5% in my most recent testing). Good sound quality. I kind of wish that it had more than six character channel labels. I like the "left" and "right" side option; I set the left up for scanning repeaters, and set the right up for the channels my family is most likely to use, as well as for open scanning. Signal reports are favorable, though that has a lot to do with the antenna and geography. It has some quirks. From the front panel you can only swap between low and high power. But within chirp there are five power options. I usually set "medium" power in the programming using Chirp, knowing that I can push the power button to get to high if I need it, for example. But I've been using it about a year now in my dusty old Bronco and it has held up great.

The things that could be better on the 5RM: It's a little on the large size, particularly when compared to the tiny UV5R. It doesn't have a squelch knob as higher end models often have. It's not weatherproof, but it's so cheap it probably doesn't really matter. It doesn't allow for dividing the 999 channels into scan-banks, as some higher end models allow. The lowest power setting is about 2.2w, which exceeds the power limits of some bands it wasn't explicitly designed to work with (GMRS channels 8-14 are max 0.5w. MURS is max 2.0w). Of course it's not made for those frequencies; it's a ham radio. But people often do use it for those bands. The display is rather hard to read in bright daylight. Some of the menus and secondary functions of the number-pad buttons are counter-intuitive or even mislabeled. However, for approximately $30, it's the best radio I'm aware of. Models that are substantially better tend to cost substantially more. It's my most frequently used handheld.

This is how this thread has gone: OP: Has anyone tried these? Others: Those won't have a very good ground plane, and that will hamper your signal propagation. OP: But this is what I want to do. Others: *shrug* then why did you ask?

You'll maybe need to show a picture demonstrating how an NMO mount on top of the 3rd brake light has a full 360 degree ground plane. Three or four feet below inside the truck bed is not acting as a ground plane. So if that's what you're expecting to consider as your ground plane, no photo needed. It's not doing what you think. Now, it may *work* to have an antenna mounted there. You'll be able to transmit and receive. But your SWR will be a little high, and your propagation in the aft 180 degrees will be relatively lousy.

I have a new-to-me F150 Lariat with SuperCrew cab. It's a 2014. The front console seems pretty full, though there's a "SYNC" panel at the base of the front panel that may have space behind it; I'm not sure. It's possible I could find room under the seat if I use a detachable faceplate style radio such as a KG1000G Plus (GMRS) or the KG -UV980P (amateur). I'm looking for examples of successful installations that seem not too intrusive or not to have that "I bolted this thing to my dashboard" look. Additionally, examples of antenna mounting would be useful. I already can't park the truck in the garage, but would prefer not becoming so tall that I also can't pull into commercial or municipal parking garages. On my 95 Bronco a hood lip-mount works great because the cowling aft of the hood is also metal, so I'm able to achieve a good ground plane. But on the F150 the cowling aft of the hood is plastic, so the ground plane would be poor with that type of mount. Cab-top is probably ideal from a functionality standpoint, but a compromise in terms of what kind of antenna I can put up there (it would pretty much be the Ghost, or frequent swapping to accommodate height obstructions).

When the radio is set in VFO mode, and you turn the knob on the right, it will move up or down through its frequency range. Step is how far it jumps with each click. If you set up the radio for GMRS, you probably wouldn't use this setting much. But it's there in case you want to move around through the frequencies to listen to things, such as in the 70cm amateur band.

240m at best, when it passes directly overhead at 17,000 miles per hour. With a decent antenna I start hearing it about 1100 miles away, a little above center frequency, and stop hearing it about 1000 miles away at a slightly lower than center frequency, due to the Doppler shift associated with its speed. It's pretty amazing, really. And it fades in and back out again not because of the miles but because of the curvature of the earth. Mariners have used line of sight formulas for centuries, of course. RF line of sight formulas are only slightly different from visual.

Line of Sight, explained You have to account for the fact we live on a spheroid.

The 701 was nothing special when I had one. 771s are great.

And it must also have a 200 mile range any time, rain or shine.

This is great information. I have a Ghost antenna (MXTA25) that I don't really use, but this would be ideal for a boat or RV where ground planes are difficult. Laird TE TRA4500N. Thanks for sharing that.

You weren't trying to call your minions in his part of the country to coordinate their burglarizing efforts, since his X post made him obviously not home to defend the place?

I have the Surecom SW102, and the NanoVNA. Advantages to the NanoVNA: You don't just get SWR, you can get an SWR curve showing you where the dip in the curve is, and can identify immediately whether the antenna is too long or too short. With just an SWR meter you have to take multiple samples and plot your own curve. Also the NanoVNA does a LOT more than just SWR. Advantage of the SW102 - It tells you the power level being transmitted. And it's very simple to use. But for accurate power, and to avoid annoying people you'll need a dummy load, too.

From The Importance of Being Earnest: It seems like whether one is a rag chewer on an amateur repeater, or on a GMRS repeater, or a rag chewer here in online forums, we're talking about the fools clever people, of course, which makes us all clever fools.

Exactly. The people with "skin in the game" are the ones who adopt this. And they're relying on someone's layman theory, not iron clad findings.

But you're experimenting with other peoples' liability, without an actual legal consultation on the issue, and other associated due diligence. That is irresponsible. And people are justified in being skeptical. People who adopt are trusting your discussion with a friend who practices law not pertaining to communications law, putting themselves at risk.

I've re-read the FCC Part 95 Subpart E language several times over. I've watched the video twice. I've re-read the FCC language, and followed all the references in Subpart E through to the other documents they refer to. And still I don't see any new information here that would change my mind that the FCC has explicitly disallowed what the video is claiming to be legal.

It's a ham radio, and your technician's amateur license would allow you to transmit with that radio in the 2m (144-148MHz), 1.25m (222-225MHz), and the 70cm (420-450MHz) bands. Dual-band antennas are pretty common. Tri-band are less common but still available. Unless you specifically need it to work on some other band, a common dual-band 2m/70cm, or 144/430MHz, or VHF/UHF antenna is probably what you want. I thought that radio comes with an Abbree dual-band antenna. If you're looking for an external dual-band antenna, there are many options out there.

Every {condo,online,otherwise-fun} association has one.