This high quality circuit with complementary symmetry was found in an Electronics World of 1966. It can be made with modern transistors like the BD or TIP series.
The search coil of this detector consists of 140 turns of wire 18 in an 8 inch diameter form. The...
This circuit was found in a 1980s documentation. The low voltage circuit uses a PUT. Transistors can...
Shunt-type regulators are connected in parallel with the load by diverting the current to behave as a...