What is 'scatter-winding' anyway??
Many high-end pickup manufacturers like to boast (myself included) that their pickups are "scatter-wound," but many people don't really understand what this term means. In fact the whole art of winding pickups is quite foreign to a lot of people, even if they play guitar. Quite simply, scatter winding is a method of making pickups that results in a unique and beautiful sound. In this post I'll take a stab at trying to explain the principles of this method.
In the '50s, electric guitars started getting extremely popular. Humbuckers, used primarily in Gibson guitars, used a uniform wind made on a machine; and single-coils, used primarily in Fender guitars, used a scatter-wound coil made by hand. Technically you could use either method for either type of pickup, but it is widely believed that single-coils sound better scatter-wound. Tension also matters when winding a pickup, looser winds typically sound clearer and better.
When coils are wound on a machine, each consecutive wind is very close to the last wind. when you scatter-wind a pickup the idea is to put lots of space between each consecutive wind, this lowers the distributed capacitance of a pickup so that more treble and detail get through. Your tone control on your guitar has a capacitor on it, as you turn that control counter-cockwise it uses more and more of that capacitor to bleed off highs to the ground, and the result is you hear a darker guitar tone. Scatter-winding does just the opposite, it gives the pickup more treble. This sounds really good on single coils because they have a very open sound to begin with, extreme highs and extreme lows, a lot of the guitar's natural tone and character comes through.
Update 08/04/2010You can also scatter-wind by simply guiding the wire back and fourth faster across the bobbin, thus putting more distance between each wind.
Scatter-wound pickups are more expensive because they have to be made by hand. It also makes the pickup more unique because you can never exactly replicate what you did before, so each pickup has its own tonal character. When Fender first started out as a company, all of their pickups were wound by hand, they are considered by many to be some of the best sounding pickups in the world. Today they make thousands of guitars a year so naturally it doesn't make sense for them to hand-wind each pickup, but there are a few other winders out there like myself who still hand-wind every single pickup.