This circuit was found in General Electric documentation from 1968. The circuit uses triac from the time as well as transistors that can be replaced by modern equivalents.
This amplifier is from a 1990s Linear Technology component manual. The circuit requires...
This circuit was found in a 90s RF Design. It is an oscillator that can reach 800 MHz, with the...
The transistors used in this crystal tester are general-purpose types. The circuit was found in...