Преобразователь цепи FM300A + усилитель 2 0 канала комбинированный мощности 100 Вт/8 Ом

Преобразователь цепи FM300A + усилитель 2 0 канала комбинированный мощности 100 Вт/8 Ом

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Core line:

Refer to the well-known machine FM300A circuit, using the same type of gold-sealed transistor as the input and voltage level. The voltage level works in a pure Class A state, and the final stage uses the 0N tube king MJL4281 as the output. The sound is full of flavor. The power amplifier board used has completely independent design for the left and right channels. The monophonic design is adopted, and a board integrates the rectification, filtering, protection, and amplification parts. The layout is compact and reasonable, so that the board has high index parameters, even exceeding the reference machine.

Sound characteristics:

It has a super middle frequency, perfect dynamics, control, and low frequency

Core components:

6 gold-sealed transistors, 15032/15033 push, 0N tube king MJL4281 output

Transformer: 350w Nippon Steel Transformer

All-aluminum chassis: the bottom plate adopts 5mm thick aluminum plate for heat dissipation

Use ALPS27 potentiometer

parameter:

Output power: 8 ohms 100w*2, 4 ohms: 150w*2

Quiescent current: 200mA

Input impedance: 18k

Output noise: 0.2mV

Measured frequency response: within 20-20khz±0.2db

Full frequency distortion: full power is less than 0.001%

Machine size: W430*H80*L260mm

All the whole machines and finished boards in our shop are welded by American ALPHA solder wire, with stable welding quality, low internal resistance, bright, and strong oxidation resistance