 Their DC resistance tends to be around 7–8 kΩ for neck pickups and 8–9 kΩ for bridge pickups.Early P-90 pickups made before approx 1974 were manufactured with no difference in the bridge and neck position and were interchangeable.After winding, pickups were hung on a rack holding 20 pickups and assembled according to the model of guitar they were to be used on (Soap-Bar or Dog Ear).