PREAMP 9 Single-Ended Pure Class A 20HZ-20KHZ Transistor Preamplifier Board

 

PLEASE NOTE THE BUYER: There is no wiring diagram, datasheet or instruction manual for this product. Please contact us by email if you need any help, we will try our best to help you, thank you!

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


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