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MAGNETIC_CARTRIDGE_PREAMP

2017-01-16 08:18  
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MAGNETIC_CARTRIDGE_PREAMP
Uses Signetics PA239 dual low-noise amplifier designed specifically for low-level low-noise applications. Stereo channel separation at 1 kHz is typically 90 dB, and total harmonic distortion without feedback is 0.5%. Circuit matches amplifier response with RIAA recording characteristic. Supply voltage can be between 9 and 15 V at 22 mA. Article gives design equations.-A. G. Ogilvie, Construct a Magnetic-Cartridge Preamp, Audio, June 1974, p 40 and 42.