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Update: I've had three of these radios in the past three years. One of the radios stopped transmitting correctly as the final amplification stage went out. This was due to an intermittent short in the antenna feed-line that was not apparent, making it not as much the fault of the radio but more the operator. As stated before, protection of the finals seems inadequate. The second unit worked for a couple years then began to drift off frequency. This is likely a fault in the oscillator crystal. The third unit is functional but seldom used. Repair of the first unit is reasonable if you do the work yourself as the radio uses a common Mitsubishi mosfet which can be purchased at a reasonable cost (under $100). You will need a good solder vacuum pump. The unit with the frequency drift problem will not be repaired as the work would exceed the value of the radio. You should consider these a somewhat expensive disposable radio as you will likely not be able to find a service shop willing to work on these or most other Chinese transceivers.Initial reports from a colleague in radio indicated he was able to transmit in AM (Amplitude Modulation) as well as receive AM. I have recently acquired a TH-9800 that, although receives AM when the mode is set in the menu, still transmit in FM. short answer: NoSome initial reports found online indicated this radio could transmit in AM (Amplitude Modulation) as well as receive AM. I have recently acquired a TH-9800 that, although receives AM when the mode is set in the menu, still transmit in FM. There are some variations of the Quad Band TYT TH-9800 being sold. There is a "Plus" model that is supposed to have updated improved firmware.There are some variations of the Quad Band TYT TH-9800 being sold. There is a "Plus" model that is supposed to have updated improved firmware. Reports of the Plus model being able to transmit AM (Amplitude Modulation) have been made. I am sceptical and so are my colleagues. Reports of the Plus model being able to transmit AM (Amplitude Modulation) have been made. STAND BY FOR LABORATORY REPORT WHICH WILL BE POSTED HERE WHEN COMPLETE.<big>No Tytera TYT TH-9800 will transmit in AM. The internal circuitry to transmit with amplitude modulation does not exist within the radio.</big> An example of the false claim made by someone using the Internet moniker "Izzyandsue" can be found here: * https://forum.ih8mud.com/threads/cb-and-quad-band-all-in-1-ham-radio-is-this-true.959057/page-2 Again, no model of TYT TH-9800 will transmit with amplitude modulation, although they will receive AM. If a "trucker" can hear you as Izzyandsue claims, it would be very distorted or they are using a multi-mode radio that can operate in FM.