Please note: This is the front level of the electronic tube, which cannot be pushed directly into the box or directly into the headset.
AUDIO NOTE M7 is a famous and pleasant courage level;
PRT-02A refer to the amplifier circuit of the machine, so that new students can also get H cost-effective products at very little cost.
This version adopts compatible design and can adapt to different electron tubes through jump caps on PCB. It is compatible:
jump cap short circuit A1 = 6N2, 6N11, 6922 and other 6V power supply tube (6N1 current is too large, not suitable)
jump cap short circuit B1 = 6N4, 12AUT, 12AX7, 12AT7 and other 12V power supply electronic tube
PRT-02A is designed as an integrated board, with DC filament power supply, high voltage band voltage stabilization and electronic filtering, and direct streaking.
Voltage input requirements:
filament part:
AC6-12V no less than 1A (when the input exceeds 9VAC, please pay attention to the heat generation of the heat sink)
high voltage part: AC200-240V, no less than 10MA
We have matching small EI transformer
Size: 127X75X80 (including copper column and tube height)
Special note: In order to reduce the internal resistance of the high-voltage part of the power supply, the discharge resistor is not designed in this version, so the discharge of the high-voltage part is extremely slow after power failure. Do not touch the high-voltage part of the device.
(250VDC, just draw it after touching it, it is quite energetic 
)
