Dual High Voltage Regulator Power Supply +DC Filament PSU PCB For GG Tube Preamp
Item Details
Dual High Voltage Regulator Power Supply +DC
Filament PSU PCB For GG Tube Preamp
Description:
Notice: Just Bare PCB board only, Not contain other parts.
PCB Size: 130*70mm, 1.6mm thick, spray tin process.
Ground Grid GG tube preamp Power supply board, it can also be applied to other tube pre-amp board, high voltage output high voltage can be changed by changing the zener diode. The low voltage output board can be adjusted directly.
Note that the high-voltage output current of this power board is recommended to be within 1A. Low pressure is less than 1.5A. Low pressure up to 2A. More than 1.5A. The LT1085/LM317 pay attention to enhanced heat dissipation.
This PCB reserved two 5W Zener tube package positions, for the serial connection method, when the output voltage is 200V, 200W voltage regulator can be installed, and the other needs to be shorted.
When other voltages are needed, two identical or different voltage regulators can be connected in series. If 250VDC is needed, a 130V and 120V regulator can be connected in series.
The choice of high voltage regulator pressure difference:
Because of the use of MOS tube as a high-voltage regulator, and MOS tube in the "small warm" under the sense of hearing will be even better, and the overall pre-amp tube current is generally not too much (usually about 10MA), in considering the voltage In addition to fluctuations,
We recommend a pressure difference of not less than 50V, recommend a pressure difference of 80-100V, and it is better to use the warm hand temperature on the MOS tube. If the pressure difference is not enough or the working current is too small, the heat sink can be removed to increase the temperature.
GG tube pre-amp power settings:
GG tube pre-amp is positive and negative 200V power supply, in the application of the board, the board will be short-circuited between the positive and negative points of the two groups of high voltage output ground, so that the combination of positive and negative 200V high voltage power supply.
The GG tube pre-amp uses three 12AU7 (AX7). The filament voltage of this type of tube is 12V6, 150MA. It is recommended that the filament supply current be not less than 500MA.
High-voltage power supply no less than 15MA current reserve per group.
Packing List:
1PCS x High Voltage Power Bare PCB
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