PCB size: length 112mm, width 77mm
The assembeld board max height about 35mm
The voltage of this board can be adjusted within the range of about +180-350VDC.
It can basically directly solve all high-demand preamplifier high-voltage power supply solutions. With an excellent power supply, it will give you a sense of tranquility. The output high voltage of this board is gradually superimposed and increased when it is turned on, so that the impact on the gallbladder is less.
The circuit is base on famous Matisse preamp Power supply parts line, which is specially designed for small current power supply such as Tube preamp and is not suitable for use in places such as power amplifiers.
Our assembeld board is adjusted to about +280V before sending out. Suitable for Marantz 7 preamp etc.
Our long-term test conditions are input AC230V, output DC280V, current 30mA,
（note: this 230VAC is from power transformer. not the main city voltage 230V)
The assembeld board using LM317 and TIP50 is used. but is is 100% original and works very well.
BOM for Bare PCB:
Resistors: 150Ω x3, 330Ω x1, 10K x2, 510K x2, 100K/3W x2, 270K/3W x4
Capacitor: 100uF/450V x2, 47uF/450V x1, 0.01uF/400V x1, 0.1uF/50V x1
1N4007 x2
1N4148 x2
1N4736A x1
DB207 Rectifier Bridge x1
MPSA92 x1
TIP50 x2
LM317 x1
5.08mm pitch 2P terminal block x2
X70 Radiator x 3
