Driver for oscillograph (T459E)

This circuit from an old MIT documentation excites an oscillograph element, an old waveform viewer.

Low noise instrumentation amplifier (CB20988E)
Found in Maxim documentation from the 90s, this circuit makes use of components from the period. The...
Equalizer RIAA with the 741 (CB7530E)
Found in an English Maplin magazine in 1983, this circuit has an RIAA equalization. We suggest its...
7812 High Current Regulator (CB4840E)
In the figure we have a way of obtaining a 13,2 V with current up to 5 A using an integrated 7812...