Hello All,

I have a Polk's Tracker III radio. It is a great way to use existing plane setup with a computer radio. Love how I can use it for almost any plane I have. It means a lot of my non-computer radios can be retired.

But, I have one hang-up I can figure out. I have a plane that really needs flap to elevator mixing. It needs a lot of down trim to keep it level as I lower the flaps. I can't get either a P-Mix or S-Mix to work. Anyone know the difference between a P-mix and S-mix?

So, I have elevator on channel two and flap on channel six, the left front knob. Standard set-up. I select either a P-mix or S-mix to be active with switch C, center right switch.

So, I have the ch 6 knob all the way counter clockwise, flaps up. I activate the mix with switch C, the elevator jumps. It then moves as I add more flaps. No matter what I do....I can't get the mixer to leave the elevator neutral until I add flaps. Any ideas on how to set up a proper unidirectional elevator to flap mixer on this radio?

Thanks,
DW_Crash