This is GB for APEX A-CLASS PSU that is designed to supply in parallel (SHUNT topology type) preamplifier and any audio circuit that needs low noise and low TIM.
Output voltage can be adjusted from +/-12VDC to +/-24VDC and max output current is set using R7 and R12 resistor. For heatsink you can use SK574-50-SA or you can use aluminium bracked that is 50mm in length, 8mm thick to cool down output shunt and ccs transistors.
This is improved design from APEX A-CLASS PSU that have improved low noise voltage reference (100uF capacitor at -IN), upgraded JFET-s that is very easy to but from mouser, and using low noise ZTX bjt for lowest noise of PSU. Input filter is RCLC and is used to suppress any noise from low frequency to high frequency. If you don't want to use L in this filter you can install two 4.7R 0.6W resistors.
PSRR is -150dB, output voltage noise is about 10-20nV/sqrt(Hz) and uses easly available TH parts! (For HLMP-6000 if you could not find one in mouser you can use standard 3mm RED LED and solder it under PCB as is in footprint).
Price for 1pcb is €6,00 plus shipping (shipping cost is from €15,00-€20,00 as these days shipping cost is high). Payment Paypal F&F only.
APEX A-CLASS PSU LIST:
nickname (number of pcb) - COUNTRY
Here is pictures of PCB that is professionally routed using all audio technique that is very important in audio psu design.
And here is how it looks when assembled in 3D (Here for GB is only PCB).
And a schematic:
Output voltage can be adjusted from +/-12VDC to +/-24VDC and max output current is set using R7 and R12 resistor. For heatsink you can use SK574-50-SA or you can use aluminium bracked that is 50mm in length, 8mm thick to cool down output shunt and ccs transistors.
This is improved design from APEX A-CLASS PSU that have improved low noise voltage reference (100uF capacitor at -IN), upgraded JFET-s that is very easy to but from mouser, and using low noise ZTX bjt for lowest noise of PSU. Input filter is RCLC and is used to suppress any noise from low frequency to high frequency. If you don't want to use L in this filter you can install two 4.7R 0.6W resistors.
PSRR is -150dB, output voltage noise is about 10-20nV/sqrt(Hz) and uses easly available TH parts! (For HLMP-6000 if you could not find one in mouser you can use standard 3mm RED LED and solder it under PCB as is in footprint).
Price for 1pcb is €6,00 plus shipping (shipping cost is from €15,00-€20,00 as these days shipping cost is high). Payment Paypal F&F only.
APEX A-CLASS PSU LIST:
nickname (number of pcb) - COUNTRY
Here is pictures of PCB that is professionally routed using all audio technique that is very important in audio psu design.
And here is how it looks when assembled in 3D (Here for GB is only PCB).
And a schematic: