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A group of high-voltage output, the output voltage is adjustable, 100-380V
Single-supply 12V filament voltage output 12V (maximum 2A)
High voltage 100-380V (up to 0.3A)
Pcb size:92x99mm
Principle:
The default shipping is: 2pcs 7812, that is, the output 12V, if the buyer can replace the 7806 output 6V to the filament power supply.
High voltage regulator output voltage and input voltage, input voltage changes, the output can be stabilized at a value. Assuming the output 100V, then the input transformer is responsible for voltage recommendations greater than 100V, such as 110V, 120V. 4pcs regulator on the board in series with the reserve position, the four parameters of the regulator tube determines the output voltage, assuming the use of 1pc 75V regulator tube, the other regulator with wires together, then the output is 75V, assuming 2pcs 75V Regulator tube in series, the remaining two positions with a short circuit, then the output voltage of 150V. And so on, 4pcs 75V regulator tube is installed on the output 300V!
The default delivery is: 4pcs 75V and 2pcs 7812 for the regulator.
The use of 7812 regulated output 12V, with a simple circuit, the role of reliable, easy access to two parallel high-current, suitable for all the basic pre-tube.
The high voltage part uses the field effect tube and the steady pressure tube to be composed, and has used the large capacity capacitance RC filter structure to increase the steady pressure, the output is more stable, the steady pressure tube uses the ON original 1W steady pressure tube.
1: the use of two Philips disassemble the original BC filter capacitor, tube-specific, the sound is European sound. (Sometimes use Sanyo capacitors)
2: filament filter using Sanya professional power capacitor filter, a number of small capacity parallel resistance lower.
3: the use of FET with voltage regulator, the effect is better than the general regulator.
4: the use of tube amp rectifier bridge, more outstanding performance tube sound!
5: input and output are used KEFA original terminal, good reliability! (Blue Philips disassemble the use of capacitors!)
Use Note: There are high voltage part of the board, the voltage is higher than the safe voltage of 36V, so be sure to pay attention to the correctness of installation! Prevent children from approaching!
Package Included:
1 x Filament Filter Power Supply Board DIY Kits （have no Circuit diagram）
Assembled board link：https://www.ebay.com/itm/353500530210
Assembled board ，just for reference：
