The Baxandall 12AT7 tube tuner, tube treble and bass controller, equipped with LG232 tone board, with volume adjustment.
The characteristic of this circuit is that the control range is very wide, and when both potentiometers are placed in the middle position, a flat response curve can be obtained. During control, the shape of the treble frequency response curve is almost unchanged, but it shifts along the frequency axis. Although the bass frequency response curve is not constant, its change is smaller than most continuously adjustable circuits.
Baxandall-type tone control circuit is a nice tone circuit, which is also widely used in professional stage audio equipment today.
Because of its unique working method, the electronic tube device has the following advantages as a tone circuit compared with discrete components and operational amplifier tones: high input impedance, large dynamic range, low thermal noise, good transient response, low distortion, good air sense, and circuit Conciseness and many other advantages. Double-sided epoxy board, metal film resistor, Dweimar/US film capacitors, 500K domestic ALPS potentiometer, Philips 33μ450V filter and decoupling, Dweima capacitor coupling, US Moroli cathode electrolysis, etc. (batch Different, the components used may be different, the components used are subject to the actual assembly), high-frequency ceramic socket.
The machine adopts the power transformer rectifier and filter power supply independently designed by this department, and the high-voltage and low-voltage lines are equipped with choke coils, which can effectively remove the power ripples and provide a more pure DC power supply for the tone board. 2 imported 12AT7 electronic tubes, luxurious and thick Iron case, the size of the whole machine is approximately: length 210, depth 188, height 81mm, 4 aluminum alloy machine feet assembly, the appearance is very beautiful. It weighs about 4.3KG.
It can also be customized as required!
The finished machine volume potentiometer is assembled with domestic ALPS.
2×24 step volume potentiometer assembly.
