gortex2

Sounds to me like the repeater has a very slight delay and you’re hearing it.  You could program in some hang time maybe or don’t let up on the PTT until a half second after you stop talking.

I voted "No" as having a dual band VHF/UHF antenna on the corner of my vehicles, I get lots of notice from people that are either amateur and/or GMRS radio users at many stop lights. The antenna is enough of a "beacon" and all interactions have been cordial so far.
Very different from when I drive my plain white Chevy Tahoe work vehicle, that looks way too much like an un-marked State Patrol vehicle at times. Everyone slows down, gets out of my way, as the antenna configuration is very similar. So is the winch mount on the front bumper. I ask for company logos on the side doors often, and my employer owns the vehicles (they are not leased which could be a valid excuse for some), as corporate does not wish to "junk up" company vehicles with stickers. 

464.550 is used a lot by business's and your most likely either hearing DMR or some other stuff on the channels. I can't count the amount of "building" repeaters I saw back in my shop days all on 464.550. It is an Itinerant frequency which means any business can license it. I suspect a repeater causing your noise. Put a PL/DPL tone on it and skip over it. 

Put CB on top and GMRS just below it on a stand off bracket. At my last house I had that setup for 15 years.
 

Put CB on top and GMRS just below it on a stand off bracket. At my last house I had that setup for 15 years.
 

Sounds like someone is running a “parrot” repeater. 

Try to remove or de-activate all other channels besides the single active repeater channel. Make sure you're not scanning.
Set repeater hang time to zero.
You can also try to change to a "split PL"  - using different PL/DPL codes for Transmit & receive.  That should tell you if there's something internally generated on the transmit side that's keeping the repeater keyed.
Without a service monitor and some RF specific test equipment, you're limited to basic troubleshooting methods. Try to eliminate potential trouble points one by one until you get it done.

The EVX-R70 has better specs for the receiver, it has a bigger (better) cooling fan than the 7000, and it also has an added heat sink on the transmitter. It will also do DMR Digital or work as conventional analog. As JohnE alluded to, it's really just a re-badged Motorola XPR8400 machine - but uses different CPS software. (make sure to toggle the software setting to 'expert' mode if you want to see all the parameters available.)
That said, for all it's good qualities, it's still really just 2 XPR mobile radios inside a box. I've been happy with the EVX-R70's I've set up. It's also nice that you can buy the EVX-R70 used for 10 to 25% less than the same thing with a Motorola label. The EVX-R70 is good and reliable for "regular" service - but they're really not 100% duty cycle 24/7 machines. I would never run one over 25 watts if I wanted it to live for years.
 

So what did you come to GMRS for then ? I'm curious because I see more and more hams going to GMRS when they have it already in HAM. I think in some part that's what's messing up GMRS. Its almost become a "ham light" to me. I get more and more baffled daily on the wants and needs of GMRS users. Ive been a ham for years and use ham radio when i want linking or data or other things it provides, but when i want simple point to point stuff GMRS is what I use. 
Yet the UV5R is not certified for any of this....so why state the reqs when you dont follow them ? 

Remember not all groups want other folks on their repeaters. This isn't ham radio. Some folks install repeaters for themselves only. I actually removed all my repeaters from this site for that exact reason. If its listed as open then send the request and wait. There are folks who come here, register a repeater and never come back. Thats part of the issue. Its been an issue for years. Others just are busy. I see messages here and there asking if my stuff is still online and I try to reply when i can to say its closed but life happens and I am sure many get lost in email land
Just wanted to share a repeater owners aspect. 

Remember not all groups want other folks on their repeaters. This isn't ham radio. Some folks install repeaters for themselves only. I actually removed all my repeaters from this site for that exact reason. If its listed as open then send the request and wait. There are folks who come here, register a repeater and never come back. Thats part of the issue. Its been an issue for years. Others just are busy. I see messages here and there asking if my stuff is still online and I try to reply when i can to say its closed but life happens and I am sure many get lost in email land
Just wanted to share a repeater owners aspect. 

There's a couple repeaters local to me on this site, and in the description they say "open repeater, no request necessary, emails will be ignored" or something like that.

Remember not all groups want other folks on their repeaters. This isn't ham radio. Some folks install repeaters for themselves only. I actually removed all my repeaters from this site for that exact reason. If its listed as open then send the request and wait. There are folks who come here, register a repeater and never come back. Thats part of the issue. Its been an issue for years. Others just are busy. I see messages here and there asking if my stuff is still online and I try to reply when i can to say its closed but life happens and I am sure many get lost in email land
Just wanted to share a repeater owners aspect. 

Remember not all groups want other folks on their repeaters. This isn't ham radio. Some folks install repeaters for themselves only. I actually removed all my repeaters from this site for that exact reason. If its listed as open then send the request and wait. There are folks who come here, register a repeater and never come back. Thats part of the issue. Its been an issue for years. Others just are busy. I see messages here and there asking if my stuff is still online and I try to reply when i can to say its closed but life happens and I am sure many get lost in email land
Just wanted to share a repeater owners aspect. 

Remember not all groups want other folks on their repeaters. This isn't ham radio. Some folks install repeaters for themselves only. I actually removed all my repeaters from this site for that exact reason. If its listed as open then send the request and wait. There are folks who come here, register a repeater and never come back. Thats part of the issue. Its been an issue for years. Others just are busy. I see messages here and there asking if my stuff is still online and I try to reply when i can to say its closed but life happens and I am sure many get lost in email land
Just wanted to share a repeater owners aspect. 

The main problem is finding a repeater controller that will work with the equipment at hand. People will build a cheap repeater using a couple of HT's or a couple of mobile radios. A lucky few can afford a real purposely designed repeater with the required interface for a controller available.  Most often there are no provisions for access to a COR, carrier operated relay, etc. so the builder ends up hacking the radios to gain access to necessary signals. When the builder's family are the only users then simply cross coupling the mic and audio outputs, with VOX enabled, is sufficient for basic functioning, because at least no ID is required.
I picked up a simple interface box to do the cross coupling between two HT's, with VOX contol, to experiment with a cross-band repeater for Ham use. A simple duplexer like the below is sufficient to get the isolation at a 5 watt level.
https://mfjenterprises.com/products/mfj-916bn#description
https://www.buytwowayradios.com/surecom-sr-628.html

I reached out to the operator of the massive repeater network on Georgia. He confirmed that the repeater for GMRS themselves do not need to send out a call sign because they are used purely for retransmission from licensed users, therefore operators of their own “stations”. Anyone not authorized is traced and asked to not use it until they get permission as well. 
See highlighted in red below.
So mine would fall under the same classification were it to go live.
§ 95.1751 GMRS station identification.
Each GMRS station must be identified by transmission of its FCC-assigned call sign at the end of transmissions and at periodic intervals during transmissions except as provided in paragraph (c) of this section. A unit number may be included after the call sign in the identification. 
(a) The GMRS station call sign must be transmitted: 
(1) Following a single transmission or a series of transmissions; and, 
(2) After 15 minutes and at least once every 15 minutes thereafter during a series of transmissions lasting more than 15 minutes. 
(b) The call sign must be transmitted using voice in the English language or international Morse code telegraphy using an audible tone. 
(c) Any GMRS repeater station is not required to transmit station identification if: 
(1) It retransmits only communications from GMRS stations operating under authority of the individual license under which it operates; and, 
(2) The GMRS stations whose communications are retransmitted are properly identified in accordance with this section.

Corey is dead on. I spent many thousands of dollars on each repeater system i have online and have money sitting in new repeaters waiting for towers. It is not uncommon to spend upwards of $10,000 if buying all new gear. My last repeater that went online was a MTR3000 ($6500.00), Duplexer ($1800.00), 7/8" Hardline (175' @ 2.50'), DB408 - ($800.00), plus connectors, hangers, cable pulls, ground kits, ground wire. Yes we can all do this stuff for a lot less but it really depends on what you want out of the repeater.
 
If you start your post with "Currently running on two Baofeng 5R with limited range" then its not a repeater that we should be putting in a database nor one that will benefit you or others. The goal is to have a repeater that is beneficial to the end user. 
 
Since I moved south I have 2 repeaters, antenna's and hard line. Neither are up yet as i want it to be worthwhile. One is waiting on a tower for my house and the other will be on a 400' tower if i can ever work out an agreement with the owners. 

If you're focused on getting 'max power' out for Transmit, then I need to ask, what are you talking to on the other end?  If you've got 4 or 5 watt portables, transmitting at 25 watts (and setting aside any antenna system gain/loss for a moment) creates an imbalanced system at best - and generates a bunch of unnecessary interference to your own receiver at worst.
In other words, if you can transmit out 15 miles, but your portables can only talk back in from 5 miles, what have you accomplished? Balance to the system is the key.
As gortex mentioned, filtering the receive side is probably more important, but most advertising will focus on the 'horsepower' number, because that's what sells. Any rookie will pick a 50 watt transmit over 25, because more MUST be better. It's just one number, and transmit power rarely tells the whole story, especially when it comes to repeater system performance. Losing 1.5 or 2 dB to gain 60 or 70 dB of isolation is a pretty good trade off, and if you put a bandpass cavity tuned to the receive frequency on the receive side of that cheap duplexer, you're going to pick up even more isolation without increasing any losses on the transmit side.
I can tell you that my basic rule of thumb for a generic repeater is to shoot for double the power of the portables being used. You're well above that at 25 watts, and I'm not aware of too many low cost repeaters that will do an actual 100% duty cycle at 25 watts. There are plenty that will approach 100% duty at 10 watts with a good cooling fan.
Until you've got a quality receiver with decent filtering on the receive side of the system, it really doesn't matter how much power your transmitter has. Isolation, selectivity, and sensitivity are all more important than raw transmit power when you're looking at a repeater system.

What repeater ? What Radios ? What antenna ? What feedline ? 
Normally by the time you buy feed line to get the distance you spent more than a cheap duplexer. If you are doing sperate antennas you will need as much vertical separation as you can get. Most dual antenna systems use filtering on the RX side of the system to notch out the TX frequency. 

Around here when I'm in town there is activity near the Walmart stores and something that is transmitting an electronic chiming doorbell like noise on one of the channels. I'm guessing that's either a wireless doorbell or driveway alarm.
When I was out away from town all of the channels were completely quiet.

UHF-1 403-470 Mhz
1-25 watts
1 line display, standard keypad
Conventional & PassPort capable
128 conventional channels

Actually I do go in the woods alot. Been in SAR for almost 30 years this month. I still wont go in the woods without my Inreach and a portable radio. While I agree something is better than nothing relying on a GMRS radio is the last thing I would do. If I go in the woods I take my ham radio if I dont have SAR coverage in that area on our public safety stuff. I have a county park with a GMRS repeater that SAR put in decades ago. While its great to have no one listens to it. The issue with GMRS is there is no "hey this is the channel" If the Travel Channel had taken off I think it may be more useful but In the last 10 years of SAR missions I've asked numerous hunters what radio they had or what channel. Over half were baofengs on the preprogrammed channels from amazon (some in public safety actualy) and the others had FRS radios but had picked a channel up high with a tone. On a mission SAR can't check every tone and channel so its really of no use. The rest of the guys/gals have a cell phone and dont get why it doesn't work in the woods. 
As reference the GMRS repeater I mentioned is on the 675 frequency and travel tone. In 3 years the only person on it has been some of our SAR folks. 

APX8500

Good for you!  That and a belt clip will really do the trick with the ladies!  ?
Honestly I suspect that’s not your call sign and you’re trolling someone here, but that’s your business as well.
Yup, your call sign is wrbu527.  I’m sorry to be right.