This circuit was found in Ferranti's 1974 transistor manual. The transistors are from the period and the frequencies generated are between 50 Hz and 2 kHz.
This circuit was found in an Electronic Design from the 90s. The integrated circuit is from that...
This circuit is from a 1980 publication. In it we have a half-wave power control in which the SCR...
We found this circuit in a Radio Electronics from February 1966. The transistor is from the time...