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.

Alarm with 4001 (CB24373E)
This alarm circuit was found in April 1975 Radio Electronics magazine. The circuit uses a 12 V...
Binary to Voltage Converter (CB25393E)
This circuit was found in the July 1991 issue of Radio Electronics magazine. It converts a binary...
Transistor Radio General Electric P715 (CB18445E)
This transistor radio was manufactured in the 60s and has 6 transistors from that time. The...