Preamplifier For Purists

30 EE October 1988 PREAMPLIFIER FOR PURISTS The ideal preamplifier is a short piece of wire. Unfortunately, we have not reached that state yet. A practical preamplifier must match signal levels and impedances of the various units in the system. None the less, the preamplifier presented here approaches the ideal state: the electronics in the signal path have been kept to a minimum. Technical Specification Signal-to-noise ratio Harmonic distortion Channel separation For all measurements: TUNER CD 0 TAPE co TAPE record L_ ----,---,==, Since the advent of the compact disc player, more and more music lovers have added one to their hi-fi system. In fact, the stage has now been reached where a great many hi-fi enthusiasts no longer, or hardly ever, use their conventional record player. The present preamplifier is aimed at these listeners. Their hi-fi sys- tem will normally consist of a CD player, a digital audio tape (DAT) player, a reel- to-reel tape recorder, a tuner, and a power ampli...