Wednesday, May 6, 2009

Pick up

I want to introduct something about Presses Steel Bearing Housing(PP,PF,PFT,PFL). ***Presses Steel Bearing Housing*** ***PP200,PF200,PFT200,PFL200 Series*** ***All of the products are according to international standar (Redirected from Pickup (music))Three magnetic pickups on a Fender Stratocaster with the pickup configuration of a fat-strat (S-S-H). The bridge (right) pickup is a humbucker and the neck (left) and middle pickups are single coils.For phonograph pickup, see Magnetic cartridge. For other uses, see Pickup disambiguation page.A pickup device acts as a transducer that captures mechanical vibrations (usually from suitably equipped stringed instruments such as the electric guitar, electric bass guitar or electric violin) and converts them to an electrical signal, which can be amplified and recorded.Contents1 Magnetic pickups 1.1 Output 1.2 Pickup sound 1.3 Humbuckers 1.4 Construction 1.5 Notation 2 Piezoelectric pickups 2.1 Preamps 3 Multi-transducer pickups 3.1 Electromagnetic 4 Optical 5 Active and passive pickups 6 Stereo and multiple pickups with individual outputs 7 See also 8 Notes 9 References 10 External links // Magnetic pickupsA magnetic pickup consists of a permanent magnet such as a AlNiCo, wrapped with a coil of a few thousand turns of fine enameled copper wire. The pickup is most often mounted on the body of the instrument, but can be attached to the bridge, neck and/or pickguard, as on many electro-acoustic archtop jazz guitars. The vibration of the nearby soft-magnetic strings modulates the magnetic flux linking the coil, thereby inducing an alternating current through the coil of wire. This signal is then carried to amplification or recording equipment via a cable. There may also be an internal preamplifier stage between the pickup and cable. More generally, the pickup operation can be described using the concept of a magnetic circuit. In this description, the motion of the string varies the magnetic reluctance in the circuit created by the permanent magnet.OutputThe output voltage of pickups varies between 100 mV rms to over 1 V rms for some of the higher output types. Some high-output pickups achieve this by employing very strong magnets, thus creating more flux and thereby more output. This can be detrimental to the final sound because the magnets' pull on the strings can cause problems with intonation as well as damp the strings and reduce sustain. Other high-output pickups have more turns of wire to increase the voltage generated by the string's movement. However, this also increases the pickup's output resistance/impedance, which can affect high frequencies if the pickup is not isolated by a buffer amplifier or a DI unit.Pickup soundThe turns of wire in proximity to each other have an equivalent self-capacitance which, when added to any cable capacitance present, resonates with the inductance of the winding. This resonance can accentuate certain frequencies, giving the pickup a characteristic tonal quality. The more turns of wire in the winding, the higher the output voltage but the lower this resonance frequency. The inductive source impedance inherent in this type of transducer makes it less linear than other forms of pickups, such as piezo-electric or optical. The tonal quality produced by this nonlinearity is, however, subject to taste, and may therefore also be considered by some to be aesthetically superior to that of a more linear transducer.The external load usually consists of resistance (the volume and tone potentiometer in the guitar, and any resistance to ground at the amplifier input) and capacitance between the hot lead and shield in the guitar cable. The cable capacitance has a large effect and must not be neglected. This arrangement of passive components forms a resistively-damped second-order low-pass filter. Pickups are usually designed to feed a high input impedance, typically a megaohm or more, and a low impedance load will reduce the high-frequency response of the pickup because of the filtering effect of the inductance.HumbuckersMain article: HumbuckerPRS's Dragon humbuckerOne problem with single coil pickups is that along with the musical signal they also pick up mains hum. Mains hum consists of a fundamental signal at a nominal 50 or 60 Hz, depending on local alternating current frequency, and usually some harmonic content. The changing magnetic flux caused by the mains current links with the windings of the pickup, inducing a voltage by transformer action.To overcome this effect, the humbucking pickup was developed, concurrently and independently by Seth Lover of Gibson and Ray Butts, working for Gretsch. Who developed it first is a matter of some debate, but Seth Lover was awarded the first patent (U.S. Patent 2,896,491). Ultimately, both men developed essentially the same concept.A humbucking pickup, shown in the image on the right, generally comprises two standard pickups wired together...(and so on) To get More information , you can visit some products about titanium aquare bar, annealed black wire, . The Presses Steel Bearing Housing(PP,PF,PFT,PFL) products should be show more here!

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