Battery Charger (CB26303E)

This automatic battery charger was found in a Popular Electronics from the 90s. The circuit uses a relay for automatic shutdown.

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CA3018 Amplifier (CB24062E)
This common emitter amplifier with 43 dB gain was found in the August 1970 issue of Radio...
E-Listening Transmitter (CB14861E)
The presented circuit emits signals in the FM band, which can be picked up from a distance of a...
11-Meter Band Receiver (CB14880E)
This receiver receives signals in the 17 MHz or 11-meter range and can be used as a base for an...