HiFi Sigma11 Power Adjustable Voltage Regulator Board Kit For DAC Headphone PSU

Description

Details：
The SIGMA11 power board is suitable for the occasion of single power supply, and 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 front stage of the four tubes.
The minimum voltage difference between the input and output of the power supply is above DC6.5V, and 10V is recommended to ensure the effect of voltage regulation.
The relationship between R10 and output voltage value is as follows:
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 onboard capacitor withstand voltage and the adjustment tube Q13 withstand voltage should be sufficient.
1. This SIGMA11 (Sigma) kit is only suitable for players who have a certain electronic foundation and soldering iron welding hands-on ability
2. Due to different purchasing batches, some components will be replaced on the premise of ensuring quality
3. This kit does not include the chassis and power transformer and large water tank filter electrolytic capacitor.
4.size 100 * 75MM,
5. When R10 is 10K, the output voltage is 23 ~ 24V (which is also the default output voltage of this kit), and an additional 50K 3296 adjustment is provided.
6. The AC voltage supplying the board should not exceed AC35V.
7. For other output voltages, there is a rule of thumb that under load, a voltage drop of about 9V-10V should be maintained through the mosfet.
8. This kit contains the insulation sheet (including two insulation grains) used for the power adjustment tube. It is equipped with 6 stainless steel screws, but does not contain heat dissipating oil.
9. The rectifier diode can be insulated without heat dissipation, but if the chassis bottom shell is used for heat dissipation, it must be insulated (including power adjustment tube).
10. For the convenience of players, one 5V and 12V regulator tube are equipped.
11. The 1N5819 pin in (Sigma11 uses constant current tube + 1N5819) is slightly oxidized. Before welding, scrape with a blade and then weld.
Note :
Bare PCB:only 1pcs power supply board pcb,not included any parts ！
Diy Kit：all parts need buyer to solder it，
（Not included main capacitance）