DIY Stereo Control Amplifire (January 18, 2020)

DIY Stereo Control Amplifire (January 18, 2020)

Specification.
- Volume control(source A only, source B is pass through)
- It can be select one source from two source
note:
Ope amplifire IC: TEXAS INSTRUMENTS OPA2134(BURR-BROWN)
Regulator IC:JRC NJM317
using Audio grade resistors at negative feedback circuit.

Over view.(Circuit boards in AEON's Top value series lunch box)

Front view.

Lunch box for assembling a control amplifire.

Lunch box for assembling a control amplifier.(bottom face)

Power supply circuit board.(using JRC NJM317(using adjustable positive voltage regulator))

Power supply circuit board.(bottom face)

Assembled on the lunch box.

Source selector circuit board.(can be select one source from two source)

Source select circuit board.(bottom face)

Preamplifier circuit board.(Gain : 10.1dB)

Preamplifier circuit board.(bottom face).

Source select circuit board, Preamplifier circuit board.

These parts are assembled in the lunch box.

Connected preamplifier unit and power amplifier unit.

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

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