Regarding the QMX get the build instructions out, look through, understand and follow the schematic / circuit from 5351 to the PA transistors in 'transmit' to see if DC Voltage is getting to the PA transistors (Centre, top and bottom? Taps T501 primary)? and use a multimeter to see what is coming out of the driver IC' (IC502 and IC503) on transmit.? Will be an AC/RF signal but should read as a few volts of DC on transmit with a multimeter
Bruce Akhurst