We found this sophisticated meter circuit in an article in Radio Electronics magazine from June 1959. The article taught how to assemble it. Transistors are common types at the time.
Found in a 1995 Hands-On Electronics, this circuit generates a sinusoidal signal whose frequency...
This is the suggested transmitter circuit for the CB16880E. The emitting LED must be a...
This Japanese commercial radio with 5 transistors is from the 60s and is powered by 6 V. It is a...