The figure shows an application of the LM377 in a small inverting stereo amplifier with output powers between 3 and 4 W. The circuit is from a Radio Electronics from April 1990.
We find this circuit in a 1978 documentation. The circuit uses two inverters of a 4049 integrated...
For the 600 kHz range coil is formed by 35 turns of 28 AWG wire on a ferrite core with a diameter...
This circuit was found in Radio Electronics from the 90s. The CMOS integrated circuit is a PLL not...