This circuit was found in the magazine of radio amateurs 73 in a 90's edition. The components are current and the transistor is of general use.
This circuit fires by burning the fuse when the input voltage exceeds the value referenced by the zener....
We found this circuit in a 80s documentation. The operational amplifier is from the time and the...
This modulator for analog video signals was found in a 1980s Motorola documentation. The circuit...