This circuit is from a 1980s Motorola documentation. The circuit can be made with modern equivalent components. The original circuit is for the 115 Vac (110 V) grid and has two settings.
This circuit can also be used as a shield if the excitation is made with 5 V and the output stage...
The circuit presented is a Japanese commercial radio from the 1960s. With a 4.5 V supply, it is a...
The accuracy of this circuit depends on adjustments made with capacitors of small tolerances of known...