Hi all,
I'm currently building a preamp. The schematic is based on something I've found in an old dusty electronics book in the local library
It uses a LM1036N for vol/bass/treb/bal control and a TDA7050 as a headphone amplifier.
Based on the schematic I have made a PCB with Eagle. Inputs are selected on another pcb and Vsupply (12V and 5V) is also provided by another pcb using 7812 and 7805 regulators. The audio input signals will be connected via solder pens and shielded audio cable.
I've made a DIY amplifier a little while ago with PCB kits, and I've also made already some PCB's (not audio). However, this is the first time I've made an audio PCB and I'm not very sure if the ground plane I've drawn is good enough to avoid hum or noise. I've already read some stuff concerning ground loops.
Could any of you please take a look at the board to see if I haven't made any mistake or screwed some things up ?
Thx
I'm currently building a preamp. The schematic is based on something I've found in an old dusty electronics book in the local library
It uses a LM1036N for vol/bass/treb/bal control and a TDA7050 as a headphone amplifier.

Based on the schematic I have made a PCB with Eagle. Inputs are selected on another pcb and Vsupply (12V and 5V) is also provided by another pcb using 7812 and 7805 regulators. The audio input signals will be connected via solder pens and shielded audio cable.


I've made a DIY amplifier a little while ago with PCB kits, and I've also made already some PCB's (not audio). However, this is the first time I've made an audio PCB and I'm not very sure if the ground plane I've drawn is good enough to avoid hum or noise. I've already read some stuff concerning ground loops.
Could any of you please take a look at the board to see if I haven't made any mistake or screwed some things up ?
Thx