[RodB]

Two unrelated things. The dashed line indicates that the two controls are mechanically linked. When you turn on the power switch you are also moving the tone switch from off to bass. Move the switch once again you short out cap 41, giving less bass. Since you brought up the power switch, it's usually better to have the line filter on the other side of the switch and connect the hot side of the line cord to the switch. This way the power is truly off until the switch is activated on. Sometimes doing the rewire is not practical, then you must make a decision about whether or not you want power on the line filter whenever the set is plugged in. I have a couple chassis in my workroom with black corners from the sad result of exploded line caps.