Трубчатая тональная плата Baxandall типа 12AX7 для усилителя мощности, предварительный усилитель, аудио усилитель для самостоятельной сборки

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Product description:

• The most reasonable Baxandall type 12AX7 valve tone circuit: British PJ. Baxandall type valve tone control circuit.

• It has been published and used as early as the monophonic period. It uses a low-distortion tone circuit that works with frequency negative feedback. Although it is a negative feedback tone control circuit, it does not use the beta loop to complete all the tone control functions. It changes the frequency characteristics of the coupling part with V1, and together with the change given by the negative feedback, it can enhance or attenuate the low frequency and high frequency. The characteristic of this circuit is that the control range is very wide, and when the two potentiometers are placed in the middle position, a flat response curve can be obtained.

• When controlling, the shape of the treble frequency response curve is almost unchanged, but is shifted along the frequency axis. Although the bass frequency response curve is not constant, its change is smaller than that of most continuously adjustable circuits.

• Baxandall type tone control circuit is the best tone circuit, and is also widely used in professional stage audio equipment today

• Due to its unique working method, the electronic tube device has the following advantages as a tone circuit compared with discrete components and op amp tone: high input impedance, large dynamic range, low thermal noise, good transient response, low distortion, and good air feel , circuit simplicity and many other advantages.

• High voltage 250V DC power supply, filament 6.3V DC power supply. About ten times magnification

• The finished board does not contain electronic tubes.

Declare:

• Due to the different assembly batches of the components on the finished board, the types, brands, models and specifications of some components will be slightly different. The components and parameters assembled on the received board shall prevail! Some components on the circuit board are second-hand disassembled products, and the finished board is inspected and sold normally.