LDA MIN_np DiY stereo audio amplifier kit assembly instructions

General assembly advice

- recommended unloaded power supply voltage (for 2x100W per 4 ohms power): +/- 40...42V

- recommended transformers (for 2x100W per 4 ohms power): 300VA transformer with 2x30...2x32VAC secondary voltage

- no PCB is supplied for the mains/line voltage input/distribution and you must build a 12...17VAC 50mA power supply for the SPRS

Assembly instructions of kit components

LDA172mc assembly instructions

PS1Sc assembly instructions

SPRSc assembly instructions

List of connections between boards

PS1S - LDA172

PS1S

LDA172

Connection type

Remarks

J95/J96(+VCC)

J9(+VCC)

solder - solder

cable min. 0,5 mm2

J97/J100(PGND)

J13(PGND)

solder - solder

cable min. 0,35 mm2

J98/J101(ZGND)

J11(ZGND)

solder - solder

cable min. 0,35 mm2

J99/J102(GND)

J3(GND)

solder - solder

cable min. 0,25 mm2

J93/J94(-VCC)

J12(-VCC)

solder - solder

cable min. 0,5 mm2

LDA172 - SPRS

LDA172

SPRS

Connection type

Remarks

J10(AOUT)

L IN/R IN

solder - binding post


 

Main page