Found in a 1980s American documentation, this crystal-controlled oscillator generates 100 MHz signals. The crystal used is 20 MHz. Modern equivalent transistors can be used.
The figure shows an application of the LM377 in a small inverting stereo amplifier with output...
This 500 MHz oscillator has an output power of 1 W when powered by a 20 V source. The circuit was...
We can use this amplifier with low impedance headphones with good performance. Possible...