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The Midland 6db-gain antenna is only about 28" tall, and with my antenna being mounted on the side-view mirror, it won't stick up higher than the roofline. This Comet CA-2x4SR antenna is 40" tall, so I'm wondering it that extra foot will make a difference. Not too much difference, I imagine...

The only equipment you need to plot a graph is an SWR meter, a pencil and some graph paper. It just takes a wee bit more time.

Go with the smallest diameter that will clear your brakes.

I would check to see if you are resonant on your current dual band antenna. Out of the two, I have confirmed that the Midland is a 5/8 over 1/2 so it shouldn't give ground plane issues. I also bought that same radio and I experienced bad picket fencing while moving above 10 mph. Midland...

I am in the southeast (South Carolina) and I have yet to harm this antenna, no matter how hard I try. https://www.hamradio.com/detail.cfm?pid=H0-000567 Also, with Pulse-Larsen, (like most) you can buy a separate spring. As far as radios are concerned, don't get too wrapped around the axle on...

An NMO ground plane kit might work a bit better for you. https://www.amazon.com/TRAM-1465-Mobile-Ground-Plane/dp/B004PGMFGM Sent from my SM-J320P using Tapatalk

But did you really go off-roading if you didn't share a video on social media? It's just like working out, you can't make any serious gains unless you Instagram it and your steps won't matter unless it's on Facebook.

You can also go to this website to plot an actual RF coverage map. Https://www.ve2dbe.com/rmonline_s.asp Be advised, it is in French and it is metric. However, you can input your antenna gain, antenna location, cable loss, antenna height, ground elevation, frequency, receiving antenna gain and...

If you use Google Earth, click on the "ruler" on the top tool bar. When the Ruler Tool pops up, click on the second tab, "Path." Make sure you check the box that says "Show Elevation Profile" You can now click two points in Google Earth and it will give you an elevation profile and the...

Their spec sheet says the operating temperature is -4° to 104°. I would definitely avoid putting it under my hood.

I have a 115 and a 275 and I get some picket fencing out of both of them. It happens with the 1/4 mag mount and it happens with both a unity gain phantom antenna and a 5/8 wave antenna mounted to a grounded and bonded NMO mounted in the roof. I think it's just inherent to these less expensive...

Just stick with what you have. Although an NMO drilled into the center of the roof is the "ideal" setup, we all have to deal with compromises on occasion, and this is your compromise. Will that extra two feet of height squeeze a bit more range? Yes. Will having all of your antenna above the...

I don't quite understand your goals here. You did say that you currently run the Midland antenna, are you having issues with it? How does it currently perform?

That isn't tuned for GMRS. Sent from my SM-J320P using Tapatalk

Those brake light mounts are more expensive than my Kenwood TM-V71. Sent from my SM-J320P using Tapatalk

I tell ya', that first time you drill a 3/4 inch hole in an otherwise perfectly good roof is quite a liberating experience. However, I do understand your apprehension. If possible, see of you can find a local radio shop, i.e. the place that does the installs for the police/fire/EMS vehicles in...

Another bonus with the magnetic NMO on the roof; if you hit a tree branch or a parking garage, it will just knock over. Sent from my SM-J320P using Tapatalk

The antenna length has everything to do with the frequency in which it intends to radiate. A 1/4 wave CB antenna at 27mhz will be around 8.5 feet. A 1/4 wave GMRS antenna at 462mhz will be around 6 inches. If you would prefer to not drill a 3/4 inch hole in your roof, (which there is nothing...

You would be hard-pressed to get a CB to reach that too in many cases. Here is a neat little calculator to determine best-case-scenario for line of sight and radio horizon. https://www.everythingrf.com/rf-calculators/line-of-sight-calculator