This circuit behaves as a voltage controlled resistor and can serve as a small load. The circuit is from a Radio Electronics from July 1988.
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...