Not true, the HW-101 had a CW/MIC gain control. This control acts much like an RF Power control on a solid state radio. In the CW mode this control adjusted the drive to the final amplifier, to be legal all one had to do was to advance the drive level using this control and peak the load and tune for maximum power output at a given level that related to whatever drive power the SB-220 needed to produce a legal limit output. It wasn't like it was impossible to use the two and no way to be legal. The issue is if anyone ever heeded to the rules.