
1) Electromagnetic component
Found on
https://www.crosswordclues.com/clue/coil-tap

A coil tap is a wiring feature found on some electrical transformers, inductors and coil pickups, all of which are sets of wire coils. The coil tap(s) are points in a wire coil where a conductive patch has been exposed (usually on a loop of wire that extends out of the main coil body). When the coil taps are disconnected, the coil operates as norm...
Found on
http://en.wikipedia.org/wiki/Coil_tap

Switch used to break up a hum bucker into single coil sounds or vice versa
Found on
http://mediawebsource.com/guitar/glossary.htm
No exact match found.