All items tagged with Free and Amplifier (3)

| Decent potentiometers for setting the volume in amplifiers are still quite expensive. However, there is a cheaper alternative, and it’s bett...

| A headphone amplifier with outstanding sound quality can be built using readily available modern components. Omitting the output transformer...

| An amplifier is described which, after a tuning fork has been struck, gives a continuous 440 Hz tone (= International A), so that the user...