This sensitive circuit was found in an Electronics Hobbyists Handbook from the 1990s. The circuit can use common general-purpose transistors in place of the original ones.
This oscillator uses a small transistor amplifier or radio output transformer. We found it in a...
Found in a 1995 Hands-On Electronics, this circuit generates a sinusoidal signal whose frequency...
This TTL circuit is from a Radio Electronics magazine from February 1973. The circuit must be...