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As Steve says, but there's more to it than just getting a battery. You'll need a charger for the battery, something like Amazon.com: 14.6V 10A LiFePO4 Battery Charger Special for 12V LiFePO4 Battery, Trickle Charger for Lithium Iron Phosphate Battery, Battery Maintainer, Built-in Safety Protections, Support Fast Charging : Automotive along with the crimp tools for the connectors. You'll need a couple of crimp on connectors for the battery. They'll need to be .250 inches wide for an F1 tab. Quicksilver Radio will sell you a premade power pole connector for the battery box Play-Series™ Powerpole Mount.

Why did you attempt a firmware update? Was there a problem with your radio the update was supposed to fix? The old saw, "If it isn't broken, why fix it" applies. This goes along with the caution that an incorrectly applied update will make your radio unusable.

Probably the station ID being broadcast in Morse Code.

You know, you are very annoying bragging about what you have without providing any information regarding brands or where to find equivalents. Just what brand is your "80A supply," where did it come from, and, what' the current cost. Try saying something truly useful for a change.

That will work, but I'd future-proof and go with a 25-30A model instead.

Any antenna that has an SO-239 connector. You'll also need coax between your radio and the antenna. Look for coax labeled as LMR-400 or equivalent. DO NOT USE RG-8 and its variants.

Almost any power supply putting out 10A (12oW) will do for that radio. For a 50W radio, you'll need 15A up to 20A (180-240W).

The 60W power supply is good for receiving only. You'll need at least 96W to transmit but a 240 to 360W will be much better. I'll also recommend 2 antennas, one for the car with the other for the house.

This is the primary reason I went from GMRS to amateur. At the time I received my Tech license (2021) there were no GMRS repeaters operational in my area of south Asheville and the only traffic was on FRS from a couple senior residences and a local fast food place. My experience with amateur prepared me for the loss of power and having my Go-Box radio up and running on fully charged batteries. We lasted 3 days before traveling out of state due to no water and a route being open allowing us to go north. During the 3 days we were here, our club repeater was running on emergency power and traffic was being passed both in and out of the area. With no AM radio, we had no news except for what was passed over our net. So, when the fecal matter hit the revolving impeller, my wife and I were both prepared and able to contribute.

Radiated signal has very little effect on distance. You are increasing the signal density within the same area governed by the height of the antenna above the terrain level as dictated by the curvature of the earth. The distance to the horizon doesn't change no matter the power of the signal. Increased power primarily affects the area at the fringe of the coverage area making a marginal signal stronger.

l Well, part of this is BS, but there are some parts that are correct. There are two paths that must be considered along with the radiated power of the target unit. There is a "talk out" path which is the repeater's coverage area. This depends on three things, antenna height, antenna type, and radiated power. This is also dependent on the terrain (more than obstructions) between the units. The other path is the return or "talk in" path. This path is also dependent on the same restrictions as the repeater. Obstructions do have an effect on the two paths, but their effect is more dependent on the type of obstruction and the density and - the total amount of obstructions. Trees, depending on the type, can interact with the signal. Leaves on trees such as the oaks Texas has in abundance have less effect than say a mesquite or pine. This is because the shape of the leaf can be seen as a mini antenna that acts as a receiver absorbing some of the signal. Buildings contain metal which blocks radio signals, and both the type and amount create problems. On the other hand, buildings and hard, dense ground like rocky cliffs can also be reflectors causing the signal to bounce in a different direction. The power of the radiated signal doesn't increase distance as much as it fills the same area with more signal (signal density). The antenna determines how the signal is radiated. The most common is an omnidirectional having a doughnut shape around the center of the radiating element. How fat the doughnut is depends on the gain of the antenna. The higher the gain, the less "fat" shape of the pattern.

I think you are overdoing the security aspect. Using a digital signal such as DMR or NXDN would probably be all the security your son's team would need. While you re not supposed to use digital signaling in the FRS or MURS bands, a few radios operating low power would probably be dismissed by most people. The limited power, 2 W or less will also limit interference to others.

You are correct in that no one person or entity (other than the FCC) owns or controls the channels. No person or group can stop you from using any of the channels allowed by your license or device. You are free to receive any channel or frequency, however, you are allowed to transmit on authorized channels. With only 8 channels or frequencies available for repeaters the key concept is sharing use. The rules clearly state that no user is not to intentionally cause interference, and they must accept any interference to their use of the channel. In the situation you asked about, all channels being in use, it then comes down to sharing and accepting the fact you will both cause and receive interference. The users of a single channel should agree between themselves what type of interference is acceptable and how much is considered reasonable. It is against the rule about sharing if one user deliberately causes other users of the frequency interference by causing their transmissions to be interfered with just as any retaliation against an interferer is not allowed.

Welcome to the forum and good luck with the test. Best advice - don't overthink the questions.

Actually you can. If the SWR decreases at higher frequencies the antenna is short. Conversely, if the SWR decreases at lower frequencies you need to start trimming in 1/8 inch chunks.

What type of labor are you going to do"?

Reports on other models of Radtel state they're not great but adequate.

The party controlling the White House selects the Commissioner and the majority of the other members. they used to be engineers but that changed to lawyers 40 or more years ago.

Site owner - Rich

Really that's a question for Rich as it is his site and he knows the registration requirements.

Amazon also has it for $374.13 but you may be able to get free shipping if Prime. https://www.amazon.com/Hustler-G6270-R-Station-Antenna-Connection/dp/B00FYUW6H6/ref=sr_1_9?crid=2QDOYM4F018MF&dib=eyJ2IjoiMSJ9.Vd3s9Y4qmh9yveZ29u2R0gfB6CVJaqFgmTsW3_NH2jc_y4zQhAD3IOsDYLqsPydNKEHKLSjZyYbrGG8XB6myXI4souVsXOItKD9VMRsYzxlbNpxSxfcjdYsfiKeFqk3OJXvsFCJwIMzW2uHoezGae7Zf85NGMqFkftuiuuQc4zIyDqncvw_0Rv4kdnb9ciFOU7YmLX6UnEBsMCbgQeqFK3EfeaqeRTqisOH5bpn6DIc.lSJybktqJKFsJKYNI-4OUizVnJKoEN2X0pQDjQ0j1EE&dib_tag=se&keywords=hustler+g6+antenna&qid=1729965713&sprefix=hustler+g6+antenna%2Caps%2C97&sr=8-9

There are lots of choices for handheld (HH) radios for a lot less than the $200 Midland wants for theirs. Some other brands to look at include Wouxun, Retevis, Radioddity, TID, and BTECH (Baofeng) to name a few. Prices range from $24 for a Baofeng UV-5G to $70 for a pair of Baofeng UV-5R radios on the first Amazon page I pulled up. Personally, I've been reading good reports on the Radioddity and the TID radios along with the more expensive Wouxun units.

I like Gretsch

How do you know you aren't transmitting? Channel 1 is simplex meaning you receive on the same frequency where on repeater channel 1 you are using two frequencies.

Let's break your statement down. First of all, you are correct in that the radius is an approximation (really, guesstimation) on the coverage area. Some of the best estimations are based on a mathematical model developed by the team of Anita Longley and Phil Rice in Boulder Colorado. Their model, the Irregular Terrain Model, takes the curve of the earth along with its ridges and valleys into play and does a fairly accurate job of predicting if a signal sent from one point reaches another point and at what strength. The model takes several things into consideration in its projection of coverage. Chief among them are the "big three" of frequency, radiated power, and the height above ground of the antenna. Also playing an important part of the calculation is the radiation pattern for the transmitting antenna. The coverage radius for a repeater is typically based on just two factors, the transmitter power and antenna height. This provides a guess that you should be able to both transmit and receive better than 80% of the time within the area calculated. The only time the model is 100% correct is when there is a clear path between the two stations (line of sight for VHF and UHF). So yes, you are correct in stating because you are in the radius reception and transmission may not be possible. But other than that, the rest of your statement should not be taken as being fully accurate. The ability to reach a fixed location, the repeater, depends soley on the position and power from the mobile station. We refer to this condition as the "talk out" and "talk in" projections.