Preamp Circuit

Using a K-12 tube amp with a NAD C542 CD player, there is no need for a buffer or visit page. music which the K-12 does so easily. There was always something missing when it came to a convincing delivery. I felt a little of that beautiful valve warmth was required, so I tried a very affordable Valve Preamp kit from Silicon Chip Online. The preamp kit is based around a common 12AX7 dual triode. The line level (Hi-Fi) version of the kit has the gain set at 4 (6 dB). What makes this kit very inexpensive is that power comes a switch mode power supply, fed from a 17 volt DC wall wart!...
line level preamplifier. The K-12 is a very polite and sweet amp with all the warmth of it`s `hot bottle` heritage. However, when I compare the K-12 with my monoblock chip amps (LM3875), I was never convinced that the chips amps really delivered the passion of the

Electric Motor easy to make

A simple electric motor homemade, easy to make.

1. 1 meter of wire
2. magnet
3. one battery AA or AAA
4. Improvisation

Five Band Graphic Equalizer circuit

Other one unit of graphic EQ. five bands. The basic difference with the other circuits is, that I use instead of IC, transistor and the power supply, go up in +/- 24V DC, ensuring low distortion and bigger margins of overloading. With switch S1, we can isolate the EQ. inside or except operation, leaving the musical signal to pass without no alteration.. visit page.

Five Band Graphic Equalizer circuit   

5 Band Graphic Equalizer Circuit

This circuit is for graphic equalizer that can build with low components count and control using LA3600 single IC chip. The internal design of the chip uses transistors gyrator circuit, with connections to external capacitors to set the response. This is the figure of the circuit. Sorry, this picture is not clear. This graphic equalizer circuit is suitable for tape-recorders, radio-cassette recorders, car stereos, or home theater sound systems. Maximum supply voltage VCC max 20V must not be exceeded. The operating voltage is in the range of 5 to 15V. [Schematic diagram source: SANYO Electric`s Application Notes].
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5 Band Graphic Equalizer Circuit

Audio Equalizer

Designed for communications use, this equalizer circuit uses a Mitsubishi M5226P audio equalizer IC to adjust frequency response. It runs from a 9 to 20 V supply. C6 through C16 are polyester film capacitors of ± 5% tolerance.

Audio Equalizer

Octave Equalizer Circuit

This circuit is one section of an octave equalizer used in audio systems. The table shows the values of CI and C2 that are needed to achieve the given center frequencies. This circuit is capable of 12 dB boost or cut, as determined by the position of R2. Because of the low input bias current of the OP-08, the resistors could be scaled up by a factor of 10, and thereby reduce the values of CI and C2 at the low-frequency end. via next.gr

Octave Equalizer Circuit

300 watt – 1200 watt MOSFET Amplifier

When you need an amplifier with high watt power. For use in applications such as concert, theater, the festivals etc. This circuit is most suitable. Both Loudness and durability, that courage to try. For this circuit, typically the maximum watt power at load 4 ohm equal to 300 watt. or about 200 watt at load 8 ohm. Which the watt power very much this level. If you are not satisfied. Also may added a higher power.

300 watt – 1200 watt MOSFET Amplifier