Mark in Australia has put together a moving magnet phono preamplifier using a electronics hobby kit. The phono preamp kit provides everything you need except minus an enclosure and a power supply (AC walwart). The circuitry is contained on a printed circuit board (PCB) and consists of operational amplifiers (opamps) with up to three equalization compensation circuits which can be selected with jumpers or a switch. The kit comes with LM833, but you can use which ever opamp you prefer. The power supply is also on the PCB and uses 7812 / 7912 regulators. The design supports all of the common compensations and several 78 compensations as well.
The enclosure and power source need to be provided. For the power supply Mark used a walwart (15VAC) and the circuitry is contained in a plastic (ABS) enclosure. The inputs/output were moved to the rear.
7812/7912 regulators and moving magnet phono preamplifier
Related article
- SCHEMA PREAMPLIFIER WITH LOW INPUT IMPEDANCE SCHEMA PREAMPLIFIER: This prea
- I decided recently to build a tube preamp for my home studio. Please note, however, that
- This is high quality Preamplifier circuit with built-in USB DAC for my power amplifier
- INTRODUCTION Rod Elliott's High Quality Audio Preamp (Mk II) which is a two stage preamp
- Pretty much everything in the preamp is standard tube amplifier construction. However
- Records are cut with a frequency response such that when they are replayed with a magneti
Subscribe to:
Post Comments (Atom)
EmoticonEmoticon