Found in a 70s RCA manual, this circuit uses a transistor of the time for an UHF L band oscillator. Details of the resonant circuit, which is critical, were not given.
Found in a 90s Silicon Chip documentation this circuit is intended to protect a speaker system in...
The circuit shown is a reference of -10 V with a maximum current of 50 mA obtained from the Linear...
Found in a 1980s American documentation, this circuit can use a SCR and a general-purpose transistor....