DIY Stereo Phono EQ amplifier (February 24, 2020)

DIY Stereo Phono EQ amplifier (February 24, 2020)

Specification.
- Gain: 33.5dB for MM cartridge
- Input Impedance: 47K ohm
- DC Supply Range: 6V to 18V
note:
operational amplifier IC: TEXAS INSTRUMENTS OPA2134(BURR-BROWN)
using Audio grade resistors at negative feedback circuit.

Over view.

Design and parts planning.

Connection diagram.

Build on universal board.(C-Type FR-4(72x48mm))

Connection to the each parts on the board.

Testing the phono EQ amplifier.
-DC supply current: 13.75mA.
-Input offset voltage: 0.0mV.

Plastic case for assembling the Phono EQ amplifier.

Assembled on the plastic case.

Attach and covered circuit board.

Connect to the turntable, the control amplifier and the power amplifier.
Top: Phono EQ amplifier
Middle: Control amplifier
Bottom: Power amplifier

If you interested in the control amplifire, refer to 'DIY Stereo Control Amplifire'.

If you interested in the power Amplifier, refer to 'DIY LM1875T STEREO Power Amplifier'.

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