RF power meter (CB8977E)

This reflectometer or standing-wave ratio meter (SWR) was found in a 1980s American documentation. The diodes support general purpose equivalents.

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LM386 Oscillator (CB24988E)
Circuits like this one, using the LM386 audio amplifier, are available from other sources in this...
Passive Tone Control (CB12206E)
This bass and treble control only attenuates the corresponding signals, requiring further...
LC Audio Oscillator (CB8082E)
Using a large inductance, this circuit was found in a Popular Electronics from the 90s. The...