NOTE:
This is the price of a pair (two-channel), and the set current of the finished board is 1A (per transistor)
This configuration is equipped with thermally conductive bridge angle aluminum (not a radiator), which is convenient for customers to connect to a large radiator;
Do not leave the power on for more than 10 seconds, otherwise it may burn the power transistor.
Foreword:
HOOD JLH2003 is an upgraded work after JLH1969, changed from JLH1969 single power supply to OCL dual power supply, and combined them, the maximum output power reaches 22W (at 8 ohm load)
Compared with the single power supply of JLH1969, the output frequency response curve of JLH2003 is flatter (the frequency response curve is affected by no output coupling capacitor)
The circuit has a magnification of 13 times, which is suitable for making power amplifiers and headphone amplifiers.
Product Details:
Taiwan-made metal film resistors, non-inductive power resistors, ELNA-C feedback capacitors, Panasonic blue robe decoupling capacitors, Siemens coupling capacitors, Toshiba small transistors
The power tube is second-hand 2N3055 gold seal tube
In order to achieve the best sound quality, the static current of each tube is set to 1A, that is, the voltage difference between the two ends of the emitter cement resistance (0.1R) is 100MV
22W pure class A power amplifier, heat is relatively large, please pay attention to heat dissipation
Recommended input voltage, plus or minus 18VDC (can be rectified by dual 15VAC-200W transformers)
PCB size: 15.6*7.4*1.6MM, 1OZ copper
