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Yes, on my Pofung P15-UV, a direct cline of the Radioddity GM-30 and locked to GMRS, Menu 41 is the SYNC function and works like you describe. On my Baofeng UV-13Pro, the Ham Radio that also transmits on GMRS out of the box, it is Menu 42 and works like you describe.

On the Baofeng GM15 pro SYNC is option #42 in the menu. SYNC can simplify the display screen by showing the top “Main” line A in channel name format…..then below displays the same Channel’s frequency in the B line From the Baofeng GM15 pro manual

The picture didn't show the 2 GPS Pucks either. So in that truck I had 4 APX8500 multiband radios, 1 Sierra Wireless LTE Modem and a Lowband radio. So technically 5 radios. My new truck has the same radios but have glass mount wifi, LTE and GPS antennas due to spacing on the roof. Waiting on a new cap and will have my Starrlink and some other antennas on that and most likely move my lowband to a ball mount. What reason. Beacuse I can. . But in reality they are for my job. In my volunteer life we run multiple radios for SAR (VHF, UHF, 700/800) and can have up to 4 radios in an officers vehicle. Most just run a VHF and UHF. Public safety is all over on the east coast so not one radio will do all. Even our multibands are nice but if dispatch is calling me on UHF trunking I can't hear a user on VHF calling command. So multiband only gives us the ability to have more options. Doesn't fix the need of a tool for each job.

It’s a common myth that the TYT-TH-UV88 is an unlocked clone of the Radioddity GM-30. While there are physical similarities, that myth is not true. I retired my TYT TH-UV88 after I acquired my Baofeng UV-13Pro.

*sigh* ...

would be interesting to get a spectrum analyzer on the signal and also try to get a heading in he direction it is coming from.. Is this signal continiouse or dependable enought ot track down.. Are you getting it on one chanel? or several channels in GMRS? What Ch were you setting yiour repeater up? Did you try another? I wuoild have fun tracking that one.. wish i could help, but to darn far away to hitch up and go

Mine were all Motorola mounts. I use Laird/Larsen on all my SAR vehicles. Any decent NMO installed correctly will last for years. I have vehicles from 2008 with the same NMO in the roof still in use.

I promise not to tell Randy

TYT UV-88 is also the same hardware-wise - ham not GMRS (no longer for sale but they were popular). [TYT made the original UV5Rs, so they might be the actual manufacturer of the others. But with CCP-run businesses, it's never clear anyway.]

Nope, if you didn't get his callsign, first name and QTH (current location), it doesn't count. Keep trying. just kidding - making contact is fun when you're just getting started...I'm not sure what would get me excited anymore.

Thanks, @SteveShannon!! I appreciate all your help!!

Yes, the Radioddity GM-30 and it’s clone, the Baofeng UV-15 can be flashed with the firmware from the “unlocked” Baofeng UV-13Pro Ham Radio; making it, in effect, a UV-13Pro! I purchased a UV-13Pro from AliExpress when it first became available, as it gave me portable tone scanning for my hobby “war driving” of finding repeaters and “sniffing” out tones. It never occurred to me that the 13Pro was a hardware “clone” of my Pofung UV-15 (Baofeng UV-15 a/k/a Radiodd GM-30) even to the extent of battery swapping! And now with Chirp support, all of these models have tremendous potential and continued versatility. What is this “sync” function you are referring to, and I can see if my UV-13Pro supports it.

Yeah, that is very odd. Privacy tones make it so you can't hear a signal unless the tone is present. You should hear the signal with no tone and it should go away when the tone is enabled, unless your radio is broken. That could be possible. You hear noise when tone squelch is enabled because the radio is broken, and you're just hearing random noises from the radio itself.

Nice! Welcome to the community!

Well done!! Enjoy GMRS!

WSJV 482 here! Made my first contact today in Waynesville, NC! Didn't get his callsign but at least I finally hit a repeater!!

If I get up at 3 am it’s to use the WC.

Yep, had most of that for a long time. I don't agree on some of the survivalist/prepper frequencies - we have to work that out for ourselves and our locale. I can see somebody misreading that and getting up at 3AM to use the CB.

Do you hear this noise when the repeater is turned off?

Interesting potential modification of the GM-15pro/UV-13/Radioddity GM30. Would be curious if the GM-15pro keeps it's sync function after the firmware modification. https://youtu.be/G44BtmgYqhw?si=4Ni5-nVrD4FNZB_P

Yeah, yeah and use lag bolts with construction glue! lol

If you have a smart phone the mapping software likely has a GPS feature allowing you to get your current coordinates.

Well, maybe some logging equipment as there isn't a bit of farmland in quite some distance, well beyond the repeater. I here's a google maps pin of nearish were we tried the repeater. To further add some details, we would hear this noise on 20 or 22 repeater only with our without privacy. https://maps.app.goo.gl/ZKxaU34Jv3kgCZ7y9 <-approximate repeater location

Easy way to test is stick a thick sheet of plastic under the antenna magnetic base while the vehicle is stationary. If the match still looks OK then the glue won't make much of a difference.

Honestly if you’re going to do anything that’s more permanent than peel and stick you should really just punch a hole and install a through-hole NMO mount like @gortex2 showed.