This variable frequency (VFO) oscillator was found in a Japanese publication of 1962. Coil details (in Japanese, but can be deduced) are next to the diagram covering the 3.5 MHz band.
An input pulse produces a damped oscillation at the output of this circuit seen elsewhere on this...
The figure shows how to implement an R-S flip-flop or bistable reset-Set with an LM3900...
Radio Electronics magazine in November 1962 published in an article several circuits with tunnel...