Which L5 are you talking about, Mark? As I read the diagram, L5 is always fitted, in series with the PA PWR line (to the Final Q15), allowing the DC power through but impeding the final's RF from feeding back along the power supply. That would have no bearing whatsoever on which sideband is being generated/transmitted. Leave it alone - it has (more than) enough inductance to do the job, and low enough resistance (enough current-carrying capacity).
