We found this tube receiver in a 1950s Japanese publication. The circuit uses 5 tubes and has an RF amplifier stage for greater sensitivity. The power supply is not shown on the circuit.
We found this circuit in a Radio Electronics magazine from January 1975. The transistors are...
This circuit is from a 2001 Poptronics. The magazine no longer exists, but the components used are...
Found on an Elektor from the 90s, this TTL circuit generates a predetermined number of pulses with a...