This circuit is from a 1974 publication by Motorola. The unijunction may be 2N2646 and bipolar BC558 and BC548. The pulse duration depends on the capacitor.
Found in documentation from the 70s, this circuit uses an operational one from that time. It goes for...
This circuit is based on uncommon operations today but can be adapted to operate with more modern...
These correspond to the short-wave bands from 7 to 14 MHz, occupied by both commercial and radio...