Found in an RF Design from the 90s, this circuit is based on components from the time. It can, however, be implemented with equivalent modern components.
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...