John,
The voltage across C506 looks clean during transmit; it does drop from 12V to about 10.5V during transmit, but shows no oscillations.?
I did use the hardware test utility in firmware 1.0.6, and it indicates 30mA bias current. Measuring during transmit shows just under 1.0v to the anode of the PIN diode.? VCC is 5v into R515 and R517.? The voltage at "TX BIAS" into R514 and R516 measures 1.6v during transmit.? You might have an idea if this is in the ballpark.
But now, I'm at a point where I may have to pause a bit, as larger problems have arisen.? During the latest troubleshooting session, my QMX is no longer booting.? I'll have to solve this issue first.
Thanks for all your help,
Walt
