Very strong audio spikes in a headset can damage the ear. This circuit, from a 90s Popular Electronics cuts them, being originally indicated to operate with an integrated amplifier of the time.
We found this circuit in a 1997 documentation. Power transistors must have good heat sinks. The...
This old circuit is from the era of analog televisions, serving for technicians to make...
e find this circuit in documentation for radio amateurs of 1974. The unijunction transistor can be...