PREAMP 9 Single-Ended Pure Class A 20HZ-20KHZ Transistor Preamplifier Board
Description:
The power part of PREAMP9 is more complex and uses a three-stage filtering method:
The first stage uses the LM317T manufactured by MOTOROLA ONSEMI
The second stage uses a large-capacity inductor and RC filter,
plus a third-stage transistor RC filter. As a P9 power supplyProvides a very pure, DC-like battery.
PREAMP 9 uses a pure single-ended amplifying circuit in which the original imported BC547 C is a full NPN structure. The single-ended circuit has no complementary pairs of tubes, and only NPN does not have a PNP tube. Use only the same tube as the amplifying circuit and the constant current source load
main filter capacitor adopts ULTRA LOW ESR filter capacitor imported from Japan
Regulators use MOTOROLA (M), ONSEMI and other regulators are new and original.
All the transistors are made of imported copper feet. The BC547C has been tested and selected. All magnifications are around 600
Feature:
THD+N <0.05%
SNR >100 DB
Frequency response: 20HZ -20KHZ -0.05DB
FFT Test Test Platform AP SYS TWO , Output Voltage Signal: 1.06V
Input voltage: AC20V to AC28V (Alternative AC12-0-12 can also be used)
Input transformer power > 5VA
Static current: 25 MA
Voltage magnification = 10 times GAIN
Recommended PREAM9 preamplifier with LJM L-series post, or MX-series pure post amplifier,eg. L12-2,L20,L20SE,L15
Package:
1pc PREAMP 9 Single-ended Class A Preamp Board