MC/MM phono preamp - 100 /IV in, 100 mV out

MC/MM phono preamp elektor april 1983 The phono preamp is an important part of the Prelude, or indeed of any audio system. Gramophone records are still the recording medium that offers the highest quality, provided a good cartridge and preamp are used. Most of the really good cartridges are the moving coil type, and these require a step-up transformer or, as is more common nowadays, a so-called pre-preamp. The phono preamp and the moving coil pre-preamp described in this article are designed to form a single module. This can be incorporated in any audio system, although it is intended as part of the Prelude. MC/MM phono preamp 100 /IV in, 100 mV out Photo. The complete MC/MM phono preamp module. Once all the connecting wires are in position, it is a fairly rigid construction. Pf A phono preamp must do two jobs. It must boost the output from a moving magnet (or "dynamic") cartridge to a sufficient level, and it must modify the frequency charac- teristic in a precisely-defined way. ...