Mini Phono EQ

Description

Mini Phono EQ project suggests an idea for manufacturing RIAA Phono Equalizer in miniature size by hand made.

Main circuit of RIAA Phono Equalizer for MM cartridge is based on the reference circuit on LME49721 data sheet.
Rail Splitter circuit is for positive/negative power supply, which provides more stable power than voltage divider by resistors.
5V Power supply is supposed since the maximum power voltage of LME49721 is 5.5V from V- to V+ is 5.5V.

Making use of pitch conversion PCB from 1.27mm to 2.54mm allows us to implement peripheral parts with SOP8 OP Amps in a small size factor.

Files

Mini_Phono_EQ_Schematic.pdf Schematic Adobe Portable Document Format - 18.06 kB - 02/18/2021 at 12:11		Preview

Mini_Phono_EQ_parts_layout_rail_splitter.jpg Parts Layout Diagram (Rail Splitter part) JPEG Image - 89.08 kB - 02/15/2021 at 12:31		Preview

Mini_Phono_EQ_parts_layout_main.jpg Parts Layout Diagram (Main part) JPEG Image - 124.15 kB - 02/15/2021 at 12:30		Preview

Components

1 × LME49721 Operational Amplifiers
1 × ADA4075-2 Operational Amplifiers
2 × SOP4 28pin 1.27mm PCB

Mini Phono EQ

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Description

Files

Mini_Phono_EQ_Schematic.pdf

Mini_Phono_EQ_parts_layout_rail_splitter.jpg

Mini_Phono_EQ_parts_layout_main.jpg

Components

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