Is it me, or the QYT KT8900 manual does not specify the current consumption? I measured it. The unit I got my hands on, performs as follows:
RX: 0.27 A (backlight on, stand-by)
VHF TX LOW: 2.7 A
VHF TX HIGH: 3 A
UHF TX LOW: 2.5 A
UHF TX HIGH: 3.3 A
Readings taken at 12.5 V out from the PSU.
I have no idea what the RF power output is. But I noticed that it will not transmit below 10 Vdc, while the current drain is constant between 10 and 13 Vdc supply.