rockhound

Or, that the owner is not interested in adding you as a user and is not nice enough to tell you that. In which case, the wait would be infinite.

Congratulations to cougar100101 who passed his amateur radio tech exam and then went for his general which I believe he also passed.  Enjoyed meeting and having lunch with him as I also passed my general upgrade that day now on to extra.  Good people, good friends are made here.  

Your radio  - mxt105, isn't repeater capable.  You can monitor the frequency the repeater is broadcasting it's id on with Morse code; that's what your hearing but you can't talk or bring up the repeater because the radio you have doesn't transmit the alternate frequency required to key the repeater and make it rebroadcast  your  transmission on the same frequency you hear.  Two different frequencies 1. broadcast and 2. transmit.
There are lots of radios that are repeater capable.  If you're coming from cb radio you have been talking on what called simplex - one frequency (channel).  When you start getting into repeaters to extend your range you use two frequencies - transmit and receive.  
Be cautious how you spend your $ on radios it can really put a drain on your wallet but not necessary give you what you want.
I would suggest you look into getting a ham radio license if you like radio talk especially in Maine, you can easily talk for 100s of miles over the network of repeaters.  Most amateur radio operators are welcoming to new hams, we even have nets(group talking sections on the air -like meeting up on the repeater to chat) that help newbies learn.  Last night the Portland repeater - 147.090 group had the newbies roundtable net at 7p.m. to talk about grounding your station.  It had about 10 check ins.  The technicians(beginners license) is pretty easy to pass with a little study and opens up a world of bands and fun.   Check it out - lots of clubs and activities for amateur  radio or send me a pm if you want more information on getting licensed.  

Your radio  - mxt105, isn't repeater capable.  You can monitor the frequency the repeater is broadcasting it's id on with Morse code; that's what your hearing but you can't talk or bring up the repeater because the radio you have doesn't transmit the alternate frequency required to key the repeater and make it rebroadcast  your  transmission on the same frequency you hear.  Two different frequencies 1. broadcast and 2. transmit.
There are lots of radios that are repeater capable.  If you're coming from cb radio you have been talking on what called simplex - one frequency (channel).  When you start getting into repeaters to extend your range you use two frequencies - transmit and receive.  
Be cautious how you spend your $ on radios it can really put a drain on your wallet but not necessary give you what you want.
I would suggest you look into getting a ham radio license if you like radio talk especially in Maine, you can easily talk for 100s of miles over the network of repeaters.  Most amateur radio operators are welcoming to new hams, we even have nets(group talking sections on the air -like meeting up on the repeater to chat) that help newbies learn.  Last night the Portland repeater - 147.090 group had the newbies roundtable net at 7p.m. to talk about grounding your station.  It had about 10 check ins.  The technicians(beginners license) is pretty easy to pass with a little study and opens up a world of bands and fun.   Check it out - lots of clubs and activities for amateur  radio or send me a pm if you want more information on getting licensed.  

You can use Kenwood commercial antennas as well. I have some Laird antennas https://www.theantennafarm.com/catalog/laird-technologies-exh-155-sfu-2004
tuned for 155, the base is for many Kenwoods. I bought for a TK-2100. They fit my MURS radios; Btech MURS V1, Kenwood TK-2100 and TruTalk MURS-22 (Legacy/Maxon). They are beefy antennas and are stiffer than the Nagoya 701C. Not good or bad, just different depending on your preference. 
 
Don't hold me to it, but I bet any antenna claiming to fit a Kenwood TK-3100 would fit the GMRS V1 and be tuned for the freq range. This one looks promising, https://www.theantennafarm.com/catalog/laird-technologies-exc-450-sfu-2042. The antenna farm also has another Laird and 2 Kenwood stubbies that should fit.
 
 
Not limited to Boafeng antennas. 

Hey rockhound
If anyone finds an adapter please let me know.
https://www.amazon.com/Antenna-Adapter-Connector-Converter-Coaxial/dp/B076HHDTFT/ref=sr_1_16?ie=UTF8&qid=1520088848&sr=8-16&keywords=bnc+to+sma+adaptor
I think this is the antenna adaptor you need 
 
Are these radios capable of tone scan? 
 
Scanning for CTCSS Tone 
1. Press the [MENU] key to enter the menu.
2. Enter [11]  on your numeric keypad to come to Menu 11: R-CTCS 
3. Press the [MENU] key to select. Insure you have a tone activated (and it is not off)
4.Press the [*SCAN]to begin CTCSS scanning
A flashing "CT" will be in the left status display to indicate the radio is in CTCSS scanning mode.
In this mode, whenever the radio is receiving an RF signal on the selected MR channel or VFO frequency,
the lower display will cycle through the CTCSS tones as they are being tested. Once the frequency of the received CTCSS tone is determined, the "CT" indicator will stop flashing.  
 
Press the [MENU] key to save the scanned tone into memory then press the  key to exit the menu. 
 
We have one and ordered another last night for our grandson.
I am very pleased with this radio.

Just received a GMRS-V1 and am playing around in Chirp. Can you add into memory a repeater pair with tone? It appears that you cannot and must setup tone with the standard Repeater Channel. This works well for one repeater on a freq, but when traveling it would be nice to create a memory entry with the correct tone for other repeaters on the same freq.