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Here is a website where you can enter two points to see the path between them. It also allows you to make adjustments for elevation of the antenna. https://www.scadacore.com/tools/rf-path/rf-line-of-sight/ In my experience, the RF path for GMRS isn't purely line of sight. I have generally been able to get over or around small hills successfully, but not bigger hills. Your success in reaching the other side of town will largely depend upon how big the "dip" is on the other side of the high spot. If it dips down to 350 feet, you'll probably be fine, but if it dips back to 130 feet as it does on your side, probably not.

That could be another thread all together. I did a lot of research into the native android head units, and on the xda developers forums, the ATOTO A6 pro got the best reviews and recommendations. I’ve only used this in several installs now. And I’ll keep with the recommendation on it. There are front, rear, and subwoofer amplifier outputs, so if you need it loud, it’s very easy to get carried away. The internal amp is 30 watts RMS, so it’s more than enough to add volume and clarity to a factory speaker system. Sound quality specifically is absolutely improved over factory sound. The dual Bluetooth, WiFi, and GPS antennas make it seriously capable. Typically, I turn on my phones WiFi hotspot, and run pandora, Waze, google maps, etc... right on my dash. But having access to the google play store, I run an app called Torque pro ($5) that talks to a $12 Bluetooth OBDII adapter, and allows me to generate custom gauges on things the vehicles computer sees. Also scan, and clear check engine lights. I’ve got a dash cam, and a backup camera connected directly to it, and still have 3 available USB ports. I’m a little tempted to try a SWR app and usb dongle on it. But it has given my 1999 Chevrolet more modernization than anything else I could have done. Sent from my iPad using Tapatalk

Thanks for the information everyone. it was really helpful for a new guy like me. Yeah my cable is on its way, so hopefully I don't run to any more problems. lol

That is called “desense”. The radio that is transmitting, although transmitting on a different frequency, is actually desensitizing the receiving radio thus rendering it incapable of extracting the desired signal. It is the same effect you and your eyes suffer when you look in the direction of a bright light. Suddenly your eyes cannot make out the detail of the less bright items around you until the bright light is gone. The better the receiver design is within the radio the less it is affected by this. As Skyline said, put some space between the radios so the off-frequency transmitting radio is “less bright” to your receiving radio. Michael WRHS965 KE8PLM

Also to answer you other question, here is some good info for reading about frequency tones: Continuous Tone-Coded Squelch System Digital Code Squelch (DCS) CTCSS and DCS Tones -- What's the difference? btw - The "travel tone" is 141.3 Hz. Here is some good info about repeaters and offsets: Repeaters - RadioReferecne Wiki Offset - RadioReference Wiki For GMRS, the offset is always +5 MHz. A GMRS repeater operating on 462.675 MHz will have an input frequency 5 MHz higher at 467.675 MHz (which is also listed as a GMRS frequency). Glad you're interested in the hobby - feel free to ask any questions!