Bilbladder mixed power ----- hsh8927 amplifier

The author used the "baby" to make a mixed double-channel amplifier for many years. The pre-stage uses 6G2, 6N1 1/2 triode as the second stage voltage amplification, 6E2 is indicated by an output level, and the post-stage uses a gallbladder HSH8927 dual-channel power amplifier (BTL output). This active production is simple, excellent in performance and large output power. The circuit is shown (R channel). V1 uses a dual diode three pole to serve as input. This tube is detected in the electronic tube radio in the 1960s, which is high U.S. Di Di. The sound is bright, and the charm is full. Although many audio enthusiasts are very worship 6n11 to receive an SRPP circuit, its characteristic conversion rate is high, high frequency characteristics, but no difference in tone and stone machine (personal view), it is not as good as high U triodes. The 6G2 diode is directly connected to the ground because it is not used. Adopting the attenuation type tone network, the advantage is that the circuit is simple and mature, no self-excited, and the control range is large. But the disadvantage is that noise, nonlinear distortion is slightly larger than negative feedback tone circuits. W2, W3 adjustment low, treble, adjustment range in + 20db, due to attenuated tone network, V2 is selected in 6N1 Ubi-diode, one of which is a common angle, and it has 720 times voltage gain, To make up for the loss of the sourceless tone network. Another triode is connected to a cathode output, which is very advantageous for the driver post-level amplifier set HSH8927. V3 is commonly known as "cat eye" 6E2, which uses it displays the output voltage amplitude. The output signal is subjected to a negative pressure, and the gate of the V3 is added to the gate, and the screen changes changes to the light green light band, and the volume is varying. The power amplifier uses the HSH8927 two-channel Hi-Fi integrated circuit with input noise reduction circuitry, overheating, overload protection circuit, open / shutdown no current impact. Because the external components are extremely small; the enthusiasts are called "fool". For high fidelity and large amount of power, it will be used as a BTL circuit. When the ± 18V supply voltage, the load is 4Ω, the output power is up to 80W. Review, the sound is bright and beautiful, full of dynamic, and the aftertaste is endless. This is also the advantage of high U biliary tube + high-fidelity. Interested audio enthusiars may wish to try.

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