Apparently, the impedance of the radio is not 50 Ohms, so if you try to use it with any other aftermarket or external antennas then there will be an impedance mismatch, which could cause a lot of power to be reflected back into the radio. This is very annoying and seems to be caused by the radio still detecting a signal on the channel even though it’s supposed to ignore it if the CTCSS doesn’t match what you have set. DMR (Digital Mobile Radio) is a new standard that has been introduced by ETSI (European Telecommunications Standards Institute) for communications using digital signals. The first one I’m going to mention is that this radio has a proper frequency mode where you can spin the channel selector or type in a frequency and start using it straight away.

Did anyone take the new radio apart to see what is inside, becuase it sounds very much like the Baofeng DM-1801 / DR-1801, which replaced the MCU + C6000 + AT1846S with a single RF module, and this module is only connected via its Rx and Tx serial data pins, rather than a true USB connection. I have only had HD1 for a few weeks, but I feel that I have gained enough knowledge to provide honest opinions. Instead, I used to carry a less expensive and less capable BF device just because it had a usb type C charging port.If a review is posted that you believe is unfairly critical of your product and you wish to respond with useful information contact eHam's Product Review's Manager to request the addition of an "eHam. Being able to use both bands is essential for me as we operate around buildings and in cities as well as straight line of sight on highways and whatnot. Note: If you plug the programming cable into the computer and the device manager displays "USB-SERIAL CH340 (COM4)", it indicates that your programming cable is a new version.

I haven't dared to try this because Ailunce sent me this radio for free to test and review, and I'd hate to have to go back to them and tell them I broke it. Besides other issues I had with this radio (and even the tune tool will not improve the BER and somebody else is reporting terrible BER with DM1701 hotspot in this forum) I would strongly suggest this new version is just a waste of money. This connector would have been chosen over the normal Kenwood 2 pin connector that most Chinese radios use because it remains waterproof even when the cover is not in place. DMR is a response to the growing requirements of companies and institutions regarding security and unwanted data leakage (information has the greatest value).IP67 Waterproof: The Ailunce HD1 is designed to be waterproof and can withstand immersion in up to 1 meter of water for 30 minutes. If a manufacturer would like to announce or raise awareness for their product eHam suggests writing a brief News release and submit it to eHam's News. I don't know if the battery actually has that much capacity, but the radio does seem to have excellent battery life, especially if you turn the power down to medium instead of using high power all the time.

V1 has also colour graphical display, I do not know if any of the supported MK22-based radios has one and how much RAM/Flash ROM is still free but I would suppose the memory requirements will be increased because of its usage in OpenGD77 firmware.Another question people asked me about this radio is whether it’s a proper real DMR radio, and not a cheap Chinese knock off like the DM-5R. My conclusion is a very positive one, this radio is hands down the best handheld DMR radio I have ever laid my hands on! You could drop it and run over it and it would survive but it feels so nice in your hand that you will look after it. A lot of users complained that the audio on the HD1 would go very tinny sounding after a few minutes of use in certain conditions.

I have personally used the HD1 many times on DMR repeaters and a few times on simplex, and I can tell you it definitely works as a proper DMR radio and talks to other DMR radios exactly as it should. On the TYT MD-380 with TyMD380Tools firmware, you can very quickly and easily type in any talkgroup and start transmitting within a few seconds. Offering rewards for good reviews can create detectable bias in reviews that savvy review readers can notice. me encanto el equipo de radio, muy robusto, firme, programacion frontal por teclado, buena duracion de bateria, seria genial tener una actualización de software y firmware en español, aun no entiendo el modo promiscuo pero ya lo comprenderé, muy conforme con el producto, saludos cordiales, Benjamin.On the HD1 you have to go into the menus and scroll through until you find the right contact and then save it. The connector is the same one used on many radios, including the GP328 Plus, GP344, GP388, EX500, and HT750. Thanks for the tool information, unfortunately I am giving up on the V2 radio, as I have found out when trying to use it in real world conditions that it stops transmitting after 6 seconds when PTT is kept pushed even with all timeouts set to very high values or fully disabled (and VFO nor full reset will help with that). You need to be appropriately licensed to use this radio, and it’s not legal to use it on licence free channels such as PMR446, FRS, GMRS, or MURS.