9 V to 5 V converter LT1175 (CB14616E)

We found this circuit in the 1997 Linear Technology Applications. The components used were common at the time.

Preamplifier for 30 MHz (CB10057E)
This low noise preamplifier has a gain of 19 dB in the 30 MHz band. The circuit is from the 80s....
Nail Oscillator (CB16715E)
The transformer of this experimental circuit, which appears in other versions on the website, is...
Hearing Aid Amplifier (CB6161E)
This circuit is from a 1968 documentation using one of the first integrated circuits available at the...