Does anyone know where I can find a frequency list for these from 200-300? I am currently making stacks of these as well although I am not pushing them down as far as you are. I have a technician replace the surface mount resistors for me.

I run them all solar so for me it is not about getting them low as possible it is just about getting them low enough. I have two units/four boards running right now at 290GH for about 310W @ the wall. I built a RPi stratum proxy that I am using to reconfigure the mining cluster when needed.

Thanks for the help.