[Doug Houston]

Many people are astonished to come upon slug tuned radios, other than automotive ones. I have an RL set that has the slug tuning, as well as a Delco table set with it. The slug tuning rig used less chassis space than conventional condensers, though that was not much of an issue in chassis design. I doubt if manufacturing cost was ever an issue with slug tuning.

My feelings are that it's just another way of tuning the set, that works, and surprises people.