WRXB215

@Lscott Loved that show.

Select Menu #9 for receiving DPL tone or Menu #11 for transmitting DPL tone, select tone from list, confirm, enjoy.
Pro Tip: DCS, DTC, & DPL all refer to the same thing.

Pumping 50 watts in and getting 33 to 35 watts out at the far end of a 65 foot run of LMR400 is completely reasonable at 450 MHz. The higher the frequency, the greater the attenuation. 
Don’t get this confused with SWR. It’s not the same thing. Measuring SWR at the two endpoints of a lossy cable will result in different measurements of SWR. At the radio end an SWR meter sees the full strength of the forward power but only measures the reflected power after it has been attenuated in both directions, making the antenna appear to have a lower (possibly much lower) SWR than it really is.
At the antenna end of a lossy coax cable an SWR meter measures the actual forward RF delivered to the antenna after losses in the cable.  The SWR meter also measures the actual reflected power from the antenna, yielding a more accurate measurement of SWR.
 

@Lscott is right. I would suggest you hook the wattmeter between every section to see where the loss is. 

If it’s real LMR-400 coax you should read about 67% of the input power at the end of the 65 foot run. That’s at 450MHz from a data table I have. GMRS is a bit higher frequency so the loss is a tiny bit higher from that factor. Crappy feed throughs and other poor coax end connectors can reduce the power more. 

As Steve mentioned, GMRS is a "Bring Your Own Contacts" type of service.  Very utilitarian.  If someone is looking for people to chat with on the radio, I always recommend getting your Amateur Radio license.  Particularly a General class or Extra class.  Then, there are millions of potential people to chat with, both on local Ham repeaters and Nation-wide, as well as globally on HF.

What do you mean I have to take it off in put it in a separate tray to go through the X-ray machine? It’s a radio, not a shoe!

Not every repeater is in Repeaterbook.  Check the repeater database here to see if any appear within range of you.
Also, are you always able to hear it or does it come and go?
 

https://www.wearethemighty.com/mighty-history/the-first-time-the-us-tested-an-emp-weapon-was-a-doozy/
A lightning strike is not the same as a nuke produced EMP pulse or a solar flare. However it can exhibit similar effects. 
 
The main effect is the high electrical field intensity in volts per meter. For nukes that could be in the range of thousands of volts per meter. 
 
https://www.energy.gov/sites/prod/files/2021/01/f82/FINAL HEMP MEMO_1.12.21_508.pdf

I thought this might be a topic with general interest.
How many out there have specifically prepped one or more radios, chargers, battery packs, programming cables, software and computers to safe guard against an EMP event or similar. That would be specifically Faraday boxes etc. to store the above items.
If you have what radio(s) are you going to bet your life on and how did you do the prep? I’ve read about stuff as simple as a “shielded” bag to double storing sensitive electronics in metal trash cans stored inside of another while metallic tape used to seal the edges etc.
The “event” doesn’t have to be human generated. Something like a huge CME would do.
https://www.history.com/news/a-perfect-solar-superstorm-the-1859-carrington-event

This might help:
“After searching online forums, we found we could program our Baofeng GM-15 using the RadiOddity software for the GM-30, along with the Baofeng programming cable that came with our radio. We used the RadiOddity program to input in the transmit and receive tones (QT/DQT) for our local repeater and input a TX tone of 141.3 (a commonly used “travel tone”) for the rest of the repeater channels.”
from https://woofthebeatenpath.com/review-of-baofeng-gm-15-pro-gmrs-radio-and-setup/
 

UV-5R "GMRS" with an old Radio Shack scanner antenna I had in the garage from way back. Home made adapter. Yes, I can actually talk to people with this thing. 😉

Same here. I use 2 radios for my amateur repeater. The radios are RF linked and the up-link and down-link are separated as much as 1/2 mile depending on use case and how much power the transmitter needs to be. I found that even at 5 watts, I need about 100 feet of separation.
 
Cable-linking introduces a whole new level of aggravation. Depending on your use case, it may be easier and more affordable to simply by a low power repeater. 

I expect keeping the wires at non-resonant lengths and adding lots of ferrite beads would help. I wonder if putting each radio in its own metal enclosure (30cal ammocan?) would help. 

I put together a repeater with two KG1000G radios, and desense was a real issue, even after separating the radios by about 10 feet and adding makeshift shielding.

The duplexer doesn’t shield against RF getting into the case. It only filters to prevent the RF from the transmitter from entering via the antenna port on the receiver. 
You might expect that the metal chassis provides a shield, and to some extent it probably does, but every wire that enters the case can function as an antenna, whether it’s the power cable or microphone.
So, like I said, I suspect that some experimentation will be required. Maybe it’ll work; maybe it won’t. 

Thank you for reporting them. 

Thanks for fixing these @rdunajewski 😉

A RT97/Midland with 3' of LMR and antenna is ideal for what you want to do if you have 110V at the top of the silo. 

Coincidentally, someone started a topic a couple of days ago for just such a question as yours. Enjoy, and if you have any questions, ask away!
 

First off what is a 'channel block'  forgive my ignorance.  I have been a commercial radio tech for going on 15 years and a ham for 30.  Never heard that term.  I see things in zones and channels.
If you are scanning the simplex channels with NO tone, and scanning the repeaters with tone the radio can stop on either one if a repeater is transmitting.  If it's not looking for any tone, then any tone will work as well as no tone at all.  Because it's not looking for it.
No clue what radio you are using, so I can't even comment on the idea of priority scan.  If it's a commercial radio, and it has priority scan running it will look at a channel, then the priority list, then the next channel in the scan list then the priority list again, then the next scan list member.  This can slow scanning down a good bit, and commercial radios are NOT good scanners.  They are not fast with standard scanning, and when you turn on priority scanning they get really slow. 
 
My advice, if you are gonna be scanning, buy a scanner.  In fact as long as the stuff you are scanning is analog and not P25 trunking, buy several scanners.  If you do have trunking stuff you are wanting to monitor, get a scanner for that too.  Analog scanners are dirt cheap because they don't listen to the police any more in many places.  But if you are wanting to monitor GMRS, ham or other analog stuff they work great.
 And trying to figure out what a radio in scan mode is doing by looking at percentages of when it stops and opens up isn't really gonna work out for you.
 
 

There are several mobile GMRS radios.  Any of them will work with the UV-9G radios.  You just have to tune to the same channel.  If you set a CTCSS tone on one you have to do it on the other.
 

Welcome to MyGMRS! Thank you for your service!
250 acres is a nice size parcel (I wish I had it!), but depending on its shape and topography you might be able to get by without a repeater.  In fact, unlicensed FRS radios might even be sufficient.  A square mile is 640 acres; a 250 acre square is 3300 feet per side.  
Of course thick vegetation and hills could drastically change the range you get and maybe you intend to go outside of the parcel.

Hello all.  New to GMRS, but not new to radios/comms.  Spent 12 years in USAF as a spook, reverse-engineering communications systems from DC to daylight.
A friend has a 250 acre plot of land that we will be hunting on.  Lots of hills and valleys.  No cell phone service, so we both opted to go the GMRS route to stay in touch while deer hunting.  We both have Baofeng UV-5X3 radios, and are in the process of building a self-contained solar powered repeater  that we will be installing in one of our blinds t hat is on a nice high point on the property.
Looking forward to learning how it's done in the GMRS world.  This sure seems to be the place for that.  Thanks for having me.
 

Perfect example of why a commercial radio isn’t ideal for people who just want to buy a pair of radios off the shelf, get a license, and talk to their family while recreating.