The first bass guitar was invented by Paul Tutmarc in Seattle, Washington, USA in the early 1930's. It was known as the "Electric Bass Fiddle," and appeared in a catalog by Tutmarc's company,...
The instruments commonly acknowledged as the earlierst electric guitars were made of wood in the late 1920s and early 1930s, and served largely as prototypes for commercially produced instruments....
single coils are made by winding wires round poles, the more winds the higher the output, humbuckers are made by placing two single coils together with reverse polarity which cancels guitar hum