Scratch filter (CB22152E)

This filter for scratched disc noise was found in an English documentation from 1989. The integrated circuits used are still common today.

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Power supply for the 60 W amplifier (CB24249E)
This is the power supply for the amplifier in the previous circuit. We found it in the same Radio...
10-Channel Up Down Sequential (CB16982E)
We found this circuit in a 1990 documentation. It is totally up to date by the components it uses...
Broadband voltage follower (CB9344E)
This circuit was found in a 1970s General Electric documentation. Transistors are uncommon today....