Ton Giesberts (358)

1-10-1995 | An amplifier is described which, after a tuning fork has been struck, gives a continuous 440 Hz tone (= International A), so that the user...

1-09-1995 | The medium Power HEXFET amplifier published in this magazine in December 1993 has one small drawback: It delivers 'only' 60 W into 8 Ω (o...

1-09-1995 | On much audio equipment, the headphone output is simply derived from the loudspeaker output via a series resistor: not a very elegant desi...

1-09-1995 | The indicator is intended primarily heavy-duty PA (Public Address) for loudspeakers. Connected simply to the loudspeaker input terminals....

1-07-1995 | A Bessel filter has a fairly constant transit time (delay) over the pass band, but its amplitude characteristic starts to fall off rather...

1-07-1995 | The principle of the circuit is that on the basis of the current drawn by a mains-operated master equipment another appliance, the slave,...

1-07-1995 | The Linkwitz-Riley crossover network is known for its homogenous performance and constant amplitude. The transfer is identical to that of...

1-07-1995 | Butterworth filters have a characteristic which is virtually straight right up to the cut-off point and this makes them ideal for many ap...

1-07-1995 | A fine printer, really, that Deskjet 520 from Hewlett Packard, only it lacks a line feed button! This obvious deficiency is made good by...

1-07-1995 | Most proprietary subwoofers require you to be well-off and strong: the first to be able to afford them and the second to be able to lift t...