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HF-A60前级放大采用全分离元件放大方式,用二只2SC2240构成单差分电路作为电压放大级,输出用日立B647/D667互补对管,保证前级有极低的输出阻抗、足够宽的频响、极小的失真。功放部分的电路,遵循简洁至上的原则,前置电压放大采用二只发烧名管2SA970(耐压120V,0.1A,100MHz)组成的差分电路,P型管作为前级放大的优点:电流的变化不会影响放大倍数的变化。第二级电压放大用与2SA970配对的2SC2240,作电压放大兼推动,省去了推动级,
HF-A60 pre-amplification using full-component amplification, using two single-differential circuit 2SC2240 as a voltage amplifier stage, output with Hitachi B647 / D667 complementary pairs of tubes to ensure that the front has a very low output impedance, a wide enough frequency Ring, the smallest distortion. Amplifier part of the circuit, follow the principle of simplicity supremacy, the pre-voltage amplification using two fever tube 2SA970 (120V, 0.1A, 100MHz) consisting of differential circuit, P-type tube as a pre-amplification advantages: changes in current Will not affect the magnification change. The second level of voltage amplification with 2SA970 paired 2SC2240, for voltage amplification and promotion, eliminating the need to promote the level,