Debugging of tube amplifier 01
Source: InternetPublisher:ghaytweyhtoo Keywords: Tube power amplifier low frequency oscillation Updated: 2021/10/08
The voltage amplification stage adopts SRPP single-ended push-pull circuit. The inverting drive stage adopts a common cathode long-tail inverting circuit and the power stage adopts
a super linear current amplification circuit. The above three circuits are currently popular and practical circuits for tube amps with good electrical characteristics. The difference
is that the large loop feedback is connected to the voltage dividing point of RZ and R3, rather than directly connected to the cathode of the voltage amplifier stage. Practice
has proved that this effectively overcomes the ultra- low frequency oscillation of the amplifier .
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