Two-channel peak indicator (CB21975E)

This peak indicator for stereo amplifiers uses a CA3130. The 80's circuit does not need a symmetrical power supply.

300 mW amplifier (CB14460E)
This amplifier is powered by a 9 V source. We found the circuit in a 1964 documentation. The...
Incandescent Lamp Alarm (CB17685E)
From the STARTER (start switch), used to activate the fluorescent lamp circuit, we can build a...
90 V x 10 A Output Amplifier LM12 (CB14392E)
The amplifier presented is based on the National Semiconductor LM12 and high-power MJ transistors. The...