RIAA Stereo Preamplifier Classic Version based on NE5534

RIAA Stereo Preamplifier Classic Version based on NE5534
Here the RIAA stereo preamplifier classic version based on NE5534. This setting is intended for use with a vinyl turntable equipped with an analog output (RCA). It provides the dual function of pre-amplification and RIAA correction. This RIAA pre amp circuit is suitable for MM cells (Moving Magnet), and is not suitable for cell MC (Moving Coil). It is slightly more efficient than "RIAA stereo preamplifier classic version, based on the NE5532". (more…)

Mono Preamp based on CMOS IC CD4069

Mono Preamp based on CMOS IC CD4069
Microphone preamp described here is not a professional preamp, but the original preamp and it is cheap and easy to build. Why the original? Because it does not use non-conventional transistors or operational amplifiers (op amps) to amplify the signal from the microphone, but a set of logic gates are commonly used in digital electronics. Digital ICs used are as in the title above which is cmos CD 4049. (more…)