Balanced Line Driver (CB6223E)

This 600-ohm line driver was found in a 1980s documentation. The integrated circuit used is not common today.

Window comparator (CB8754E)
Found in old documentation, this circuit applies to almost any common operational amplifier or...
Wien Bridge Oscillator (CB8699E)
Found in Harris' 90s documentation, this circuit uses a zener as a stabilizer. The signals...
Mini Electronic Organ (CB12612E)
The circuit is from a 1978 publication and the transistor may be the BC558. The transformer is...