I am also using 33ohm resistor packs. I think it was just the length of my run past the first window that was causing the issue. I've been running like this with no issues. The other issue I am having is that my audio device keeps dropping g every time the PB16 is powered down. I have to repeat the USB cable to the small cheapo fm transmitter then it's seen again in FPP. Is there something I am missing? I am not sure why this setting will not save