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?