1W guitar amplifier

Posted on Feb 7, 2014

An alternative to the infamous ROG `s Ruby amp. As you see it shares with the Ruby the same topology: a buffer and a chip amp. It uses a JFET buffer with a MPF102 and the 1W TDA7052 chip. It is a clean amp and it reacts very well with any pedal in front of it. I don`t use a lot of distortion so this little amp suits all my needs. It doesn`t have a volume and tone control because I wanted a plug-in-and-play amp.

1W guitar amplifier
Click here to download the full size of the above Circuit.

If you want an amp with a volume control try the TDA7052A, it has a volume voltage control pin that works perfectly (simple pot), this chip has the advantage that the volume pot is not on the signal path. Of course the PUNCH also works with batteries, a 9v battery or with six 1. 5V batteries in series. For small voltages and currents the sound could become distorted or to muddy, if so decrease the 1u cap to 470n or smaller. What speakers do you recommend for use with your mini-amp circuits While the Ruby, Little Gem, and Little Gem MkII practice amps can be used with any speakers, best results are achieved with full-size speakers intended for use with guitar amps. The amps will work well with an total impedance of 4, 8, or 16 ohms. We`ve tried hi-fi speakers, clock-radio speakers, and auto speakers - they just can`t cut it. For me, using anything other than a speaker designed for the frequencies of an electric guitar produced sounds more like a toy than an actual amp. However, you may want to ask at Aron`s Stompbox Forum. Many of the members have built one of the aforementioned amps and may be able to suggest a decent-sounding small speaker. This is only in part true. One thing they are right is that clock-radio speakers and small radio speakers won`t work! But the same is not true for hi-fi speakers and auto speakers. Let me be more precise about it. I`ve tested the PUNCH and the Ruby with some 6`` auto speakers and they...

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Hi-Fi Tone Control
    Low Cost, 16Hz - 100kHz Sine-wave Generator circuit
    Mobile cell phone detector (sniffer) circuit diagram: engineering and diploma project
    Simplest lamp flasher circuit
    Designing A Four-channel Return-to-zero Ultrasound Pulser Using Supertex Hv7370 & Hv748 Ics
    Transistor regulator circuit can adjustable output voltage
    JAM (just a minute) circuit diagram
    Automatic street light circuit
    AD1865 based audio DAC with I2S input and voltage output
    Single 10 Shunt Fed Hartley Oscillator for 80 meter CW
    Delaying the release of DC relay circuit