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My main tube preamp and amp are rated at 0.08% and 0.5% respectively, and I can’t hear any more distortion with them versus my main solid state setup rated at 0.005% per component.
These common op-amp circuits are useful for amplifying various analog signals. The ideal op amp model helps us understand how these circuits operate. For more detailed information on op amp circuits, ...
Figure 3 Output spectrum of the optocoupler circuit in Figure 2 with an input signal of 200 mV RMS. As one can see, the second harmonic of a 5 to 15 W tube amplifier dominates the spectrum, and EL34 ...
An audio amplifier that uses both tubes and transistors. The tube circuits drive the MOSFET transistors at the output stage because transistors can generate more power with less heat and ...
Figure 3 shows how the circuit can be adapted to use an amplifier with gain. Follower U2 provides the current required by bootstrapping circuit R3-R4-C9-C10.
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