We found this circuit in a 1977 documentation. The National Semiconductor's LM380 is no longer easily found, but if used on this amplifier it provides excellent reproduction quality.
This decoder for FSK modulated signals can operate at frequencies of 10.8 MHz. We find it in...
We found this circuit in a 1965 publication by General Electric. The zener is 8.2 V x 1 W and the...
Found in an Electronic World, this circuit is designed to control solenoids up to 5 A. The circuit...