Sigma11 Linear Regulated Power Supply Bare PCB Board
For DAC Headphone Amp
Description:
Notice: Only Bare PCB, Not include any other electronic components.
PCB Size: 100*75mm, Thickness 1.6mm, copper thickness is 1 OZ (35UM), Green board, tin spraying process.
C5 maximum capacitor diameter 30mm
SIGMA11 outputs positive power, which is suitable for single power supply occasions. The output current depends on the rectifier tube (D1~D4) and the power adjustment tube (Q13). The output voltage is determined by the resistance of R10.
When R10 is 10K, the output voltage is 24V, which can supply power to the four-tube front stage.
The minimum difference between the input and output voltage of the power supply requires DC6.5V or more, Recommended to 10V, to ensure the voltage stabilization effect.
1, Output Voltage R10 Value Zener Diode (D5)
±36V 4.99K BZX55C12 (12V)
±30V 6.81K BZX55C12 (12V)
±27V 7.87K BZX55C12 (12V)
±24V 10K BZX55C12 (12V)
±15V 39.2K BZX55C12 (12V)
±12V not installed BZX55C12(12V)
±9V not installed BZX55C9V1 (9.1V)
±5V not installed BZX55C5V1 (5.1V) or LM336-5.0 (ADJ pin unused)
If the output is above 30V, please note that the withstand voltage of the on-board capacitor and the regulator Q13 should be sufficient.
2, The relationship between the output DC voltage and the secondary AC voltage of the transformer is as follows:
Output voltage Transformer secondary
±36VDC dual 35V or 70VCT
±30VDC dual 30V or 60VCT
±27VDC dual 25V or 50VCT
±24VDC dual 25V or 50VCT
±18VDC dual 20V or 40VCT
±15VDC dual 18V or 36VCT
±12VDC dual 15V or 30VCT
±10VDC dual 15V or 30VCT
±9VDC dual 12V or 30VCT
±5VDC dual 9V or 18VCT
Packing List:
1pcs x Sigma11 Linear Regulated Power Supply Bare PCB