Broadband Amplifier (CB6126E)

This 1 to 40 MHz amplifier is from a 1969 Motorola documentation. The components are of the time but admit modern equivalents.

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Percussion Circuit (CB20308E)
This circuit produces the sound of percussion such as blocks, drum, bell, etc. The frequency...
Intense Signal Oscillator (CB19366E)
We found this oscillator in a publication from the 1960s. The frequency is around 600 Hz with the...
Audio Frequency Meter (CB20477E)
Found in a Popular Electronics from 1992, this circuit uses a PLL567 in an audio meter bridge that...