Found in documentation from the 1980s, this circuit can generate signals between 6 and 8 MHz. The frequency can be slightly varied in the setting. FET is a general-purpose type.
This is the basic configuration of a voltage comparator with the Norton LM3900 amplifier. The...
Found in Motorola documentation from the 90s, this circuit makes use of a triac from that time. The...
In a September 1992 Radio Electronics article, we found this basic 555 circuit used to generate fixed...