This circuit was found in the June 1991 issue of Radio Electronics magazine. The circuit uses two Hall effect sensors of the time. It can be assembled using modern equivalents.
This amplifier provides 20 W of power on each channel, containing separate filters to power a...
This circuit of a few watts of power shows a typical configuration from the 70s using driver and...
We found this circuit in a 1980s Motorola documentation. The circuit makes use of common operating...