1.   All have simple knobs for analog tuning, complete with the static between stations.

2.   Instead, it had a knob that you twisted.

3.   Somebody tells him Danny has the knob in his pocket for safekeeping.

4.   The boxes typically have two knobs and a transformer or a coiled copper wire called a bobbin on the top.

5.   The window cranks had user-unfriendly knobs on the end, rough little things that abrade the hand.