| Since modern sound systems usually lack inputs for record players, separate MD preamplifiers are becoming increasingly popular. They are nee...
| Since modern sound systems usually lack inputs for record players, separate MD preamplifiers are becoming increasingly popular. They are nee...
| The AN7147 Dual 5.3-watt Audio Power Amplifier from Panasonic is listed as a ‘replacement type’ so hopefully will be around for some time to...
| In this semiconductor age, we find valves being used increasingly often for hi-fi and guitar amplifiers, top-end condenser microphones and s...
| Butterworth filters, and to a lesser degree Bessel filters, are probably the most commonly used types of analogue filters. However, in circu...
| This power supply unit (PSU) provides hum-free and stable operating voltages for valve preamplifiers and power stages. Negative bias voltage...
| Elsewhere in this collection of small circuits a 1-dB version of a third-order Chebyshev filter can be found. This 3-dB version is a bit ste...
| The instrumentation amplifier described here has two important features. Its input is electrically isolated and it has no fewer than 16 inpu...
| By utilising a special processor and a variable step-down converter, STMicroelectronics in partnership with Indigo Manufacturing have succee...
| Only a few years ago, many music lovers turned up their noses on seeing a hybrid circuit or integrated circuit in a final amplifier, but now...
| Despite semiconductors being all around us, it seems that valves have never lost their appeal and even enjoy increasing interest from the ‘a...