My TRIO KA-5500 was updated. (December 29, 2020)

My TRIO KA-5500 was updated. (December 29, 2020)

Implement for stereo power amplifier.

The circut of stereo power amplifier unit.

Stereo power amplifier unit.(for TI LM1875T IC)

Streo power amplifier unit.(bottom)

The circut of variable voltage regulated power supply unit.

regulated power supply unit.(for LM317, LM337 IC)

regulated power supply unit.(bottom)

Checking regulated power supply unit.

Speaker protection unit.(switch delay circuit)

Speaker protection unit.(switch delay circuit)(bottom)

Assembly of power amplifier unit.

Checking stereo power amplifier unit.

Implement for stereo power amplifier.