CATV amplifier (CB9409E)

Found in a 1969 Electronics World, this circuit is intended for amplifying analog cable TV signals. The transistor supports a modern equivalent.

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Timed Code Switch Alarm (CB18003E)
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JFET Timer (CB12123E)
This circuit was found in a 1979 magazine. We can use any JFET like MPF102 or BF245. The relay is 12 V...
Gain 1000 Amplifier (CB8998E)
This circuit was obtained in a 90’s documentation. The operational amplifiers are from that time....