""Hi-Fi"" pre-amplifier

hi-fi pre-amplifier Nowadays, there are quite a number of amplifier modules on the market, which usually contain the complete final output section and all the necessary single IC (the TDA 1054, which is designed for this application). The circuit diagram for the left-hand channel of the preamP is shown in figure 1. The first section of the IC contains two transistors which are used to form a magnetic cartridge preamplifier with R IAA compensation. This is the "standard" straight- through type and is not likely to need further expla- nation. It is followed by the input selection switch, S2, which connects either the tuner socket or the tape recorder socket to the second half of IC1 in addition to the cartridge preamplifier. The tone control section is passive so that no problems can arise from too much control. This is 12 V protection devices. All that is normally required ppld connect the heatsink an to mount the module on aow y device up to a suitable per su. Of course, a preampl...