I bought a pair of these radios to learn more about the 902-928 MHz band's propagation and interference levels, evaluate the potential of the band for linking between repeater sites, and to get my first taste of DMR. I was also happy to see they can be programmed for 25 kHz channels in analog mode, which is legal for hams and important to testing I want to do.
If you're a ham, understand that buying a radio with no display will rule out using some of the more interesting features of DMR. That said, I got a DMR ID number from radioid.net, downloaded the software from Retevis, used a standard two-pin Baofeng-style cable, and was able to successfully program the radios in time for a net (on a Motorola repeater) the same day the radios arrived. This band has a ton of interference on analog from unlicensed devices. In DMR mode, noise was gone, receive audio was excellent, and I got good reports from others about my transmit audio. I checked into the aforementioned net from 17.5 miles out (28 km) using the stock rubber duck.
The radios are lightweight but have a solid, quality feel, including the battery pack attachment, knobs and buttons. The batteries lasted 12+ hours of mostly receive with the battery saver function disabled. Charging from a fully depleted state took about 3.5 hours with the supplied desk charger. Bonus points for a charger which can charge a spare battery separate from the radio, and for using a non-proprietary 5V, 1A USB-A wall-wart to power the charger. You can program one of the function buttons to announce battery voltage, in the same male voice which announces zone and channel changes, so you can check battery charge level despite the lack of a display.
I got to test both my RT10s on a high-end spectrum analyzer at a local university's RF lab. Spurious emissions did not make the advertised -65 dB, but the worst was the third harmonic at -47 dBc, legal for a 1-watt radio under Part 97.
If you're buying these for unlicensed Part 15 use in the US, you're rolling the dice. To be legal at 1 watt, they'd need to run either FHSS analog, or digital modulation at least 500 kHz in bandwidth. These do neither, and the manual makes clear that they're license-free in Canada and several EU countries.
If you're buying these for ham use, you'll need a programming cable. The radio comes pre-loaded with 48 channels in three zones, a couple analog and the rest DMR, all simplex, and some conflicting with ham repeater frequencies. The radio lacks the ability to be powered directly from a 12V source.
Overall, I'm impressed with this radio. I believe it will work well for my intended use, although it's been a crash course in interpreting the manual and learning DMR settings. 73, AE4KR
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Este producto: Retevis RT10 Walkie Talkies digital recargable, radio DMR portátil con banda de baja frecuencia de congestión, radio bidireccional de mano duradera para aficionado (paquete de 2)
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Opiniones con imágenes
good 900 Mhz digital radio
The RT10 is a 900Mhz radio from Retevis. It has a feeling of being well built. it is bigger than the Baofeng radio that i have a few of. The audio quality is better than other radios I have used.I have programmed other radios with CHIRP, the RT10 needs its own programming software that you can download for free from Retevis. It is much like other DRM programming software i have seen, so it is more complex then CHIRP. I don't fully understand the programming yet. The radio comes programmed with channels already setup so you don't need to program it if you just want to start using it.Not as many people use the 900Mhz band so I have yet to hear anyone else on the radios besides our group.edit 1-15-2022After some use and testing I have found the RT10 DRM digital ISM band radio to have better range compared to some FRS radios I also have. Also better range then a UV5R, I dont know if being digital makes them better or if it is the 900MHz. I was surprised because the UV5r has more watts but the RT10 could talk when the UV5R could not.All These Radios do better with more line of sight but The RT10 on the ISM band was impressive. I am surprised there are not more ISM band radios.
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