The Different Kinds Of A Turntable Cartridge

By Stephen Reynolds


A magnetic cartridge is one important component of a record player since it is used for the recordings of analog sound playback which are also called as records. But now, the common name for this is turntable. Other terms used before are phonograph and gramophone. Cartridge is known also as pick up and it is a type of device which is electro mechanical that will convert vibrational to electrical energy. The electrical signal that the cartridge has created is amplified and is converted by loud speakers to sound.

The components of this includes cantilever, styluses, coils, magnets, and the body. The mounted stylus serves as a contact to the record groove. The styluses are usually made out from industrial gemstones or small polished diamonds. The cantilever serves as a support to its stylus and it will transmit the vibrations to magnet or coil assembly. Cantilevers before are often made from aluminum or boron. There are some types of a turntable cartridge that contains detachable cantilever and styluses which may be an advantage because there is no need to replace or remove cartridges if the styluses are worn out.

Cartridges have different kinds of variations in dissimilar in size and shape. The two most known technology principles which serve as power of the types are the moving magnet and the moving coil. Moving coils have advanced designs and are expensive unlike moving magnets. Other types of MC have designs which are cheaper but may have low quality sounds.

For magnetic cartridges, the cantilevers are always carrying permanent magnets located between two fixed coils in a form of electromagnetic generator. If the magnet responses to stylus through vibration, it will be inducing some current. And because magnets are small and have little mass, it will not be connected mechanically to its generator and the adjusted styluses follow grooves and are demanding less tracking force.

The induced magnetic types and also iron types have ferrous alloy or pieces of iron that moves. Instead of coupling magnets, these two materials are connected to its cantilevers. The permanent and the bigger magnet is positioned above the coils that provide a needed magnetic flux.

The MC cartridges design is an electromagnetic generator. Unlike the MM design, the coils and the magnet are arranged in a reverse manner. The coil is attached to the stylus and it moves within the constant magnet. A coil is made from a very fine wire and are mostly tiny. However, there may also be some MC cartridges in which the output is the same with the MM cartridges.

Another type is the moving micro cross cartridge. This MMC design is considered as one variation of MI design. Both the magnets and the coils remain in place while the micro cross will be moving with the stylus.

And one last type is a London Decca cartridge. This is considered as a unique design and its coils and magnets are fixed. The styluses have tips made from diamond, it has a short iron, and its cantilever is in L shape made from a non magnetic steel.

The short iron is positioned so close to stylus tip, resulting to a very accurate tracking of motions. Positive scanning is what the London Decca engineers call the tracking. This is a type which may be very musical but earlier versions need more forces of tracking.




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