All-Solid-State Preamplifier Part 1 - Input And Control Stages

ALL-SOLID-STATE PREAMPLIFIER PART 1 - INPUT AND CONTROL STAGES by T. Giffard The average preamplifier has too few inputs to be able to cater for all the sound reproducing equipment found in a modern household. The one described in this article has eight, sufficient to cope not only with the usual audio and hi-fi apparatus, but also with the television receiver and video recorder. All inputs are con- trolled by electronic switches, while the volume and balance con- trols are formed by digitally controlled attenuators. Apart from those refinements, the sound reproduction will stand comparison with that of any high-quality proprietary preamplifier. With the onset of stereo television broadcasting, it is becoming desirable to couple the TV set and the video recorder to high-quality audio equip- ment. Also, many households now boast two or more tape/cassette re- corders and these often can not be con- nected simultaneously to the average preamplifier. The present preamplifier has been ...