With the radio upside down, connect an ohm meter to the two tabs on the wafer farthest from the knob.
Rotate the knob counter clockwise. Note four positions shorted and two positions with a small resistance. While rotating counter clockwise, stop on the second position with the small resistance.
Adjust the knob so that "IF Broad" is up. On my radio, that meant that the screw was on the bottom.
Page: /Selectivity_switch_knob_adjust/S_s_knob_adjust.shtml
Last modified: Friday, 24 Apr 2026