Modulator Amplifier (V1574E)

This circuit is from a 1938 tube manual. Transformers are the critical components. Component values are given.

Basic Latch 2 (CB7982E)
What sets this circuit apart from the previous one is the use of only one push button. The circuit...
Frequency Selector 741 (CB16232E)
The filter shown in the figure, using only an operational amplifier, is characterized by allowing 1...
Incandescent Dimmer (CB11373E)
This circuit controls the brightness of incandescent lamps up to 400 W for the TIC226 series...