Found in Motorola documentation from the 90s, this circuit makes use of a triac from that time. The circuit is for the 110 V mains but can be modified for other grid voltages.
The Variable Frequency Oscillator (VFO) shown in the figure can generate signals in a frequency...
This circuit was obtained from a 90s Radio Electronics. The integrated circuit used HAA11508 is not...
This circuit was found in a 1980s American schematic. Transistors can be modern equivalents. The...