This oscillator was found in a 1967 EEE. The transistor supports a modern equivalent. The power supply is 20 V.
This transistor gain meter was found in a 1960 Sylvania transistor manual. The circuit is for...
This circuit for monitoring telegraphy transmissions was found in a 1975 CQ magazine. Transistors may be...
This is the version of the previous circuit with shadow activation. The circuit can use relays from...