Double limit comparator (CB9581E)

Found in documentation from the 1980s, this circuit makes use of general-purpose diodes and requires a symmetrical power supply.

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70 or 100 W amplifier (CB16658E)
This circuit provides 70 W at 8 ohms and 100 W at 4 ohms. We found this amplifier in a 1992...
Doppler Alarm (CB11609E)
This circuit was obtained in a 1989 publication and is quite simple to assemble, but critical in...
Old Transistorized Amplifier (CB18332E)
This amplifier with a few watts of power was found in a Japanese technical documentation from the...