National Semiconductor's LH0101 integrated circuit is not common today. The circuit was obtained from the 1994 Linear Applications Handbook.
This is an old test circuit for integrated TTL counters, feeding a Nixie tube, common at the time....
This old oscillator using germanium transistors has a high impedance headphone as inductor to...
This preamp with several inputs using germanium transistors from the time was found in Japanese...