Δε ξερω απο ηλεκτρονικα καθολου αλλα επειδη και εγω ειχα αναρωτηθει το ιδιο παλαιοτερα βρηκα αυτο σε ενα forum (το διαγραμμα του suhr)
http://i155.photobucket.com/albums/s311/sundaypunch_pics/hss.jpg
"When using single coils settings, the pickups "see" an around 250K load from the volume pot due to the 470K resistor wired across the hot and ground, standard 500K when using the bucker alone. Now the bucker setting breaths and the single coils settings sound just right (not too bright). The 470K resistors get switched in and out automatically.
Also when using the bucker alone, there are two .047uf caps wired together in parallel for a .0235uf value, standard .047uf when using single coils settings."