Modulator Amplifier (V1574E)

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

100 MHz harmonic oscillator (CB9659E)
This Pierce oscillator was found in American documentation from the 1980s. Transistors support modern...
Alarm with NC sensors (CB25724E)
This alarm circuit with sensors in series was found in the Electronics Now magazine of June 1994....
Distribution Amplifier (CB19012E)
This amplifier for distributing audio signals appears in other articles on this website and even...