I have the RCS-4 with two MFJ-4116.
Prior to installing my motorized HF antenna system topside, I bench-tested the core of the assembly in my shack.
The MFJ-4116 near my transceiver was injected with reversible 12vDC which was successfully decoupled at the MFJ-4116 near the motor.
So I installed the antenna-side of the assembly topside, then came into the shack to apply a reversible dc.
I expected to have bidirectional control of the motor to resonate the antenna. As I've done on the bench, by toggling reversible DC as I transmitted and watching for any SWR change.
It didn't work - Apparently the RCS-4 is somehow impeding the process.
Any thoughts, anyone?