This circuit is from an Electronics Now from the 90s. The circuit uses a power integrated circuit from the time that must be equipped with a heatsink. The power supply is 18 V.
Placed in the vicinity of a telegraphic transmitter (CW), this circuit produces an audible signal on...
This circuit provides 2.5 W of power with 6 V supply and 4-ohm speaker. We found it in the Radio...
This circuit was found in Intersil's documentation from the 70's, being indicated for powering...