More about preamp (135)

1-12-2003 | A number of years ago (November 1997), we published a design for a stereo microphone preamplifier with balanced inputs and a phantom power s...

1-10-2003 | In the first part of this article, we described all of the circuit boards. Now it’s time to look at how they fit together. We first describe...

1-10-2003 | Most commercial preamplifiers and power amplifiers have a headphones output. However, because of its simplicity the sonic quality of such an...

1-09-2003 | This stereo preamplifier is primarily intended to be used as a companion to the Valve Final Amplifier described in the April and May 2003 is...

1-07-2003 | Since modern sound systems usually lack inputs for record players, separate MD preamplifiers are becoming increasingly popular. They are nee...

1-04-2003 | This valve power amplifier is a push-pull design using two EL34s (or their 6CA7 US equivalents). It has been kept fairly simple to avoid pro...

1-02-2003 | In this semiconductor age, we find valves being used increasingly often for hi-fi and guitar amplifiers, top-end condenser microphones and s...

1-09-2002 | This power supply unit (PSU) provides hum-free and stable operating voltages for valve preamplifiers and power stages. Negative bias voltage...

1-10-2001 | The Tube Clipper is an effects unit which can be inserted in the audio path of a stereo system. It provides that ‘valve sound’, but without...

1-01-2001 | Although this supply was primarily designed for use with the Valved RIAA Preamplifier, we found that the inverter stage is useful in many ot...